progress (n.) Look up progress at Dictionary.com
late 14c., "a going on, action of walking forward," from Old French progres (Modern French progrès), from Latin progressus "a going forward," from past participle of progredi (see progression).

In early use in English especially "a state journey by royalty." Figurative sense of "growth, development, advancement to higher stages" is from c.1600. To be in progress "underway" is attested by 1849. Progress report attested by 1865.
progression (n.) Look up progression at Dictionary.com
late 14c., "action of moving from one condition to another," from Old French progression and directly from Latin progressionem (nominative progressio) "a going forward, advancement, growth, increase," noun of action from past participle stem of progredi "go forward," from pro- "forward" (see pro-) + gradi "to step, walk," from gradus "step" (see grade (n.)).
progressive (adj.) Look up progressive at Dictionary.com
c.1600, "characterized by advancement" (in action, character, etc.), from progress (n.) + -ive, or else from French progressif, from past participle stem of Latin progredi. Of taxation, from 1889; of jazz, from 1947. Meaning "characterized by striving for change and innovation, avant-garde, liberal" is from 1908.

In the socio-political sense "favoring reform; radically liberal," it emerged in various British contexts from the 1880s; in the U.S. it was active as a movement in the 1890s and a generation thereafter, the name being taken again from time to time, most recently by some more liberal Democrats and other social activists, by c.2000. The noun in the sense "one who favors social and political change in the name of progress" is first attested 1865 (originally in Christianity). Earlier in a like sense were progressionist (1849, adjective; 1884, noun), progressist (1848). Related: Progressively; progressiveness.
progressivism (n.) Look up progressivism at Dictionary.com
1855 (from 1892 in the political sense), from progressive + -ism.
prohibit (v.) Look up prohibit at Dictionary.com
early 15c., from Latin prohibitus, past participle of prohibere "to hold back, restrain" (see prohibition). Related: Prohibited; prohibiting.
prohibition (n.) Look up prohibition at Dictionary.com
late 14c., "act of prohibiting, a forbidding by authority," from Anglo-French and Old French prohibition (early 13c.), from Latin prohibitionem (nominative prohibitio) "a hindering, forbidding; legal prohibition," noun of action from past participle stem of prohibere "hold back, restrain, hinder, prevent," from pro- "away, forth" (see pro-) + habere "to hold" (see habit). Meaning "forced alcohol abstinence" is 1851, American English; in effect nationwide in U.S. as law 1920-1933 under the Volstead Act.
People whose youth did not coincide with the twenties never had our reverence for strong drink. Older men knew liquor before it became the symbol of a sacred cause. Kids who began drinking after 1933 take it as a matter of course. ... Drinking, we proved to ourselves our freedom as individuals and flouted Congress. We conformed to a popular type of dissent -- dissent from a minority. It was the only period during which a fellow could be smug and slopped concurrently. [A.J. Liebling, "Between Meals," 1959]
Related: Prohibitionist.
prohibitive (adj.) Look up prohibitive at Dictionary.com
c.1600, "having the quality of prohibiting," from prohibit + -ive, or else from French prohibitif (16c.), from Late Latin prohibit-, past participle stem of prohibere. Of prices, rates, etc., "so high as to prevent use," it is from 1886. Related: Prohibitively.
project (n.) Look up project at Dictionary.com
c.1400, "a plan, draft, scheme," from Latin proiectum "something thrown forth," noun use of neuter of proiectus, past participle of proicere "stretch out, throw forth," from pro- "forward" (see pro-) + combining form of iacere (past participle iactus) "to throw" (see jet (v.)).

Meaning "scheme, proposal, mental plan" is from c.1600. Meaning "group of low-rent apartment buildings" first recorded 1935, American English, short for housing project (1932). Related: Projects. Project manager attested from 1913.
project (v.) Look up project at Dictionary.com
late 15c., "to plan," from Latin proiectus, past participle of proicere (see project (n.)). Sense of "to stick out" is from 1718. Meaning "to cast an image on a screen" is recorded from 1865. Psychoanalytical sense, "attribute to another (unconsciously)" is from 1895 (implied in a use of projective). Meaning "convey to others by one's manner" is recorded by 1955. Related: Projected; projecting.
projected (adj.) Look up projected at Dictionary.com
"planned, put forth as a project," 1706, past participle adjective from project (v.).
projectile (n.) Look up projectile at Dictionary.com
1660s, from Modern Latin projectilis, from Latin proiectus, past participle of proicere (see project (n.)). Projectile vomiting attested from 1985.
projection (n.) Look up projection at Dictionary.com
late 15c., in alchemy, "transmutation by casting a powder on molten metal; 1550s in the cartographical sense "drawing of a map or chart according to scale," from Middle French projection, from Latin proiectionem (nominative proiectio), from past participle stem of proicere (see project (n.)). From 1590s as "action of projecting."
projectionist (n.) Look up projectionist at Dictionary.com
1916, from projection + -ist.
projector (n.) Look up projector at Dictionary.com
1590s, "one who forms a project," agent noun in Latin form from project (v.). In the optical, camera sense it is from 1884.
prokaryote (n.) Look up prokaryote at Dictionary.com
1963, from French procaryote (1925), from Greek pro- (see pro-) + karyon "nut, kernel" (see karyo-).
prokaryotic (adj.) Look up prokaryotic at Dictionary.com
1957, from prokaryote + -ic. Related: Prokaryon.
prolactin (n.) Look up prolactin at Dictionary.com
1932, from pro- + stem of lactation + chemical suffix -in (2).
prolapse (v.) Look up prolapse at Dictionary.com
1736, from Latin prolapsus, past participle of prolabi "glide fdorward, slide along, slip forward or down;" see pro- + lapse (n.). As a noun from 1808.
prole (n.) Look up prole at Dictionary.com
short for proletarian (n.), 1887 (G.B. Shaw); popularized by George Orwell's 1949 novel "Nineteen Eighty-Four." As an adjective from 1938. Related: Proly (adj.); prolier-than-thou.
prolegomenon (n.) Look up prolegomenon at Dictionary.com
1650s, "learned preamble to a book," from Greek prolegomenon, noun use of neuter passive present participle of prolegein "to say beforehand," from pro- "before" (see pro-) + legein "to speak" (see lecture (n.)) + suffix -menos (as in alumnus). The same sense is in preface (n.). Related: Prolegomenary; prolegomenous.
prolepsis (n.) Look up prolepsis at Dictionary.com
1570s, "the taking of something anticipated as already done or existing," from Latin prolepsis, from Greek prolepsis "an anticipating," literally "a taking beforehand," from prolambanein "to take before," from pro- "before" (see pro-) + lambanein "to take" (see analemma). Related: Proleptic; proleptical; proleptically.
proles (n.) Look up proles at Dictionary.com
"offspring," 1670s, from Latin proles "offspring, progeny" (see prolific).
proletarian Look up proletarian at Dictionary.com
1650s (n.) "member of the lowest class;" 1660s (adj.) "of the lowest class of people;" with -ian + Latin proletarius "citizen of the lowest class" (as an adjective, "relating to offspring"), in ancient Rome, propertyless people, exempted from taxes and military service, who served the state only by having children; from proles "offspring, progeny" (see prolific).
proletarianism (n.) Look up proletarianism at Dictionary.com
1844, from proletarian + -ism.
proletariat (n.) Look up proletariat at Dictionary.com
also proletariate, "the lowest class," 1853, from French prolétariat, from Latin proletarius (see proletarian). In political economics, "indigent wage-earners," from 1856. Leninist phrase dictatorship of the proletariat attested from 1918.
prolicide (n.) Look up prolicide at Dictionary.com
"killing of one's child or children," 1824, introduced by Dr. John Gordon Smith in the 2nd edition of his "Principles of Forensic Medicine;" from Latin proles "offspring" (see prolific) + -cide.
It is hoped that this word will be considered entitled to reception, on the score of analogy. We have long had parricide, fratricide, and infanticide, all (if I may use the figure of speech,) of the same family; and recently the very appropriate term foeticide has been introduced into Forensic Medicine. In both these last crimes there is a peculiarity arising from the person accused being, in almost every instance, the parent .... In this relation to the beings destroyed, the general term of murderer, or murder of offspring seems to be the fair converse of parricide; and will suit well the purpose of the Medico-legal writer, who considers the two cases as parts of one subject, for the designation of which collectively a proper term was wanting. [Smith]
proliferate (v.) Look up proliferate at Dictionary.com
1857 as a term in biology; see proliferation. General sense from 1961. Related: Proliferated; proliferating.
proliferation (n.) Look up proliferation at Dictionary.com
1859, "formation or development of cells," from French prolifération, from prolifère "producing offspring," from Latin proles "offspring" (see prolific) + ferre "to bear" (see infer). Meaning "enlargement, extension, increase" is from 1920; especially of nuclear weapons (1966).
proliferative (adj.) Look up proliferative at Dictionary.com
1868, from proliferate + -ive.
prolific (adj.) Look up prolific at Dictionary.com
1640s, from French prolifique (16c.), from Medieval Latin prolificus, from Latin proles "offspring" + root of facere "to make" (see factitious). Latin proles is contracted from *pro-oles, from PIE *pro-al-, from *pro- "forth" (see pro-) + *al- "to grow, nourish" (see old). Related: Prolifical (c.1600).
Prolific is in common use, but to make a satisfactory noun from it has passed the wit of man. [Fowler]
prolix (adj.) Look up prolix at Dictionary.com
early 15c., from Old French prolixe (13c.) and directly from Latin prolixus "extended," literally "poured out," from pro- "forth" (see pro-) + base of liquere "to flow" (see liquid (adj.)).
prolixity (n.) Look up prolixity at Dictionary.com
late 14c., from Old French prolixité "verbosity" (13c.), from Latin prolixitatem (nominative prolixitas), from prolixus (see prolix).
prologue (n.) Look up prologue at Dictionary.com
early 14c., from Old French prologue (12c.) and directly from Latin prologus, from Greek prologos "preface to a play, speaker of a prologue," literally "a speech beforehand," from pro- "before" (see pro-) + logos "discourse, speech," from legein "to speak" (see lecture (n.)).
prolong (v.) Look up prolong at Dictionary.com
early 15c., back-formation from prolongation or else from Old French prolonguer, porloignier (13c.), from Late Latin prolongare "to prolong, extend," from Latin pro- "forth" (see pro-) + longus "long" (adj.); see long (adj.). Related: Prolonged; prolonging; prolongable.
prolongation (n.) Look up prolongation at Dictionary.com
late 14c., from Old French prolongation (14c.), from Late Lation prolongationem (nominative prolongatio), noun of action from past participle stem of Latin prolongare (see prolong).
prom (n.) Look up prom at Dictionary.com
"student formal dance in celebration of graduation," 1894, American English shortened form of promenade (n.). Prom dress attested from 1975.
promenade (n.) Look up promenade at Dictionary.com
1560s, "leisurely walk," from Middle French promenade (16c.), from se promener "go for a walk," from Late Latin prominare "to drive (animals) onward," from pro- "forth" (see pro-) + minare "to drive (animals) with shouts," from minari "to threaten" (see menace (n.)).

Meaning "place for walking" is 1640s; specifically "walkway by the sea" late 18c.; British sense of "music hall favored by 'loose women and the simpletons who run after them'" is attested from 1863. Sense of "dance given by a school" is from 1887.
promenade (v.) Look up promenade at Dictionary.com
"to make a promenade," 1580s, from promenade (n.). Related: Promenaded; promenading.
Promethean (adj.) Look up Promethean at Dictionary.com
1580s, from Prometheus + -an. Before the introduction of modern matches (see lucifer), promethean was the name given (early 19c.) to small glass tubes full of sulphuric acid, surrounded by an inflammable mixture, which ignited when pressed and gave off light.
Prometheus Look up Prometheus at Dictionary.com
demigod (son of the Titan Iapetus) who made man from clay and stole fire from heaven and taught mankind its use, for which he was punished by Zeus by being chained to a rock in the Caucasus, where a vulture came every day and preyed on his liver. The name is Greek, and anciently was interpreted as literally "forethinker, foreseer," from promethes "thinking before," from pro- "before" (see pro-) + *methos, related to mathein "to learn," from enlargement of PIE root *men- "to think" (see mind (n.)). However Watkins suggests the second element is possibly from a base meaning "to steal," also found in Sanskrit mathnati "he steals."
promethium (n.) Look up promethium at Dictionary.com
radioactive element, long one of the "missing elements," 1948, so called by discoverers Jacob Marinsky and Lawrence Glendenin, who detected it in 1945 in the fusion products of uranium while working on the Manhattan Project. From Prometheus, who stole fire from the gods and was punished for it, + element name ending -ium. "The name not only symbolizes the dramatic way in which the element may be produced in quantity as a result of man's harnessing of the energy of nuclear fission, but also warns man of the impending danger of punishment by the vulture of war." [Marinsky and Glendenin]
prominence (n.) Look up prominence at Dictionary.com
1590s, "projection," from obsolete French prominence (16c.), from Latin prominentia "a jutting out" (see prominent). Meaning "distinction, conspicuousness" is attested by 1827. As a type of solar phenomenon, from 1862.
prominent (adj.) Look up prominent at Dictionary.com
mid-15c., "projecting, jutting out," from Latin prominentem (nominative prominens) "prominent," present participle of prominere "jut or stand out, be prominent, overhang," from pro- "before, forward" (see pro-) + minere "to project," from minae "projections, threats" (see menace (n.)). Meaning "conspicuous" is from 1759; that of "notable, leading" is from 1849. Related: Prominently.
promiscuity (n.) Look up promiscuity at Dictionary.com
1834, "indiscriminate mixture," from French promiscuité (1752), from Latin promiscuus "mixed" (see promiscuous) + French -ité (see -ity). Sexual sense is from 1844. Earlier was promiscuousness (by 1773 general; 1808 sexual).
promiscuous (adj.) Look up promiscuous at Dictionary.com
c.1600, people or things, "mingled confusedly, grouped together without order, consisting of a disorderly mix; indiscriminate," from Latin promiscuus "mixed, indiscriminate, in common, without distinction," from pro- "forward" (see pro-) + miscere "to mix" (see mix (v.)). Meaning "indiscriminate in sexual relations" recorded by 1857, from promiscuity. The Latin adjective was used with conubia (such as between patricians and plebeians). Related: Promiscuously.
promise (n.) Look up promise at Dictionary.com
c.1400, "a pledge, vow," from Old French promesse "promise, guarantee, assurance" (13c.) and directly from Latin promissum "a promise," noun use of neuter past participle of promittere "send forth; let go; foretell; assure beforehand, promise," from pro- "before" (see pro-) + mittere "to put, send" (see mission). The ground sense is "declaration made about the future, about some act to be done or not done."
promise (v.) Look up promise at Dictionary.com
c.1400, from promise (n.). Related: Promised; promising. Promised land (1530s) is a reference to the land of Canaan promised to Abraham and his progeny (Hebrew xi:9, etc.; Greek ten ges tes epangelias).
promising (adj.) Look up promising at Dictionary.com
"showing signs of future excellence," c.1600, present participle adjective from promise (v.). Related: Promisingly.
promisor (n.) Look up promisor at Dictionary.com
1790, agent noun in Latin form from promise (v.). Apparently restricted to legal use.
promissory (adj.) Look up promissory at Dictionary.com
mid-15c., from Medieval Latin promissorius, from Latin promissus, past participle of promittere (see promise (n.)). Promissory note recorded by 1670s.