Online Etymology Dictionary

outcrop (n.): 1805, in geology, "exposure of rocks at the surface," from out + crop (n.) in its sense of "sprout, head."
outcry (n.): mid-14c., "act of crying aloud," from out + cry (v.). In metaphoric sense of "public protest," first attested 1911 in George Bernard Shaw.
outdated (adj.): also out-dated, 1610s, "grown obsolete," from out + past participle of date (v.1). Out-of-date is attested from 1610s.
outdoor (adj.): 1748, from out + door. Out-of-door is from c.1800.
outdoors (adv.): 1817, from outdoor + adverbial genitive. As a noun, "open spaces," recorded from 1857.
outdoorsman (n.): 1924, American English, from outdoors + man (n.).
outen (v.): "put out," 1916, American English dialectal; see out (adv.) + -en (1). An idiom in Pennsylvania German.
outer (adj.): late 14c., comparative of out (on analogy of inner), replacing by 18c. forms descended from Old English uttera (comp. of Old English ut "out") which developed into utter and was no longer felt as connected with out. Outer space first attested 1901 in writings of H.G. Wells.
outermost (adj.): 1580s, from outer + -most.
outerwear (n.): 1921, from outer + wear (n.).
outface (v.): 1520s, from out (adv.) + face (v.). Related: Outfaced; outfacing.
outfield (n.): 1630s, "outlying land of a farm" (especially in Scotland), from out + field (n.); sporting sense is attested from 1851 in cricket, 1868 in baseball. Related: Outfielder.
outfit (v.): 1840, from outfit (n.). Related: Outfitted; outfitting; outfitter.
outfit (n.): 1769, "act of fitting out (a ship, etc.) for an expedition," from out + fit (v.). Sense of "articles and equipment required for an expedition" first attested 1787, American English; meaning "a person's clothes" is first recorded 1852; sense of "group of people" is from 1883.
outflank (v.): 1765, from out (adv.) + flank (v.). Figurative use from 1773. Related: Outflanked; outflanking.
outflow (n.): 1869, from out (adv.) + flow (n.).
outfox (v.): "outwit," 1939, from out + fox (q.v.). Related: Outfoxed; outfoxing.
outgoing (adj.): 1630s, "that goes out," from out (adv.) + going. Meaning "sociable, friendly," attested from 1950, on same notion as in extrovert. Middle English had a noun outgoing "a departure," mid-14c., from a verb outgo "to go forth," and Old English had utgangende "outgoing" (literal). Related: Outgoingness.
outgrow (v.): 1590s, "to surpass in growth," from out + grow (v.). Meaning "to become too large or too mature for" is attested from 1660s. Related: Outgrowing; outgrown.
outgrowth (n.): 1837, from out (adv.) + growth. Figurative sense "natural product" is earlier (1828).
outgun (v.): 1690s, from out (adv.) + gun. Related: Outgunned; outgunning.
outhouse (n.): early 14c., "shed, outbuilding," from out + house (n.). Sense of "a privy" (principally American English) is first attested 1819.
outie (n.): in reference to navels, by 1972, from out (adv.) + -ie.
outing (n.): late 14c., "action of going out;" mid-15c., "act of putting out;" verbal noun from out (v.). Meaning "airing, excursion, pleasure trip" is from 1821.
outlander (n.): 1590s, "foreigner," from outland (see outlandish) + -er (1). Probably on model of Dutch uitlander, German ausländer. In South African English it had a specific sense of "not of Boer birth" (1892) and was a loan-translation of S.African Dutch uitlander.
outlandish (adj.): Old English utlendisc "of a foreign country, not native," from utland "foreign land," literally "outland" (see out + land (n.)) + -ish. Sense of "unfamiliar, strange, odd, bizarre" (such as the customs of foreigners may seem to natives) is attested from 1590s.
outlast (v.): "to last longer than," 1570s, from out (adv.) + last (v.). Related: Outlasted; outlasting.
outlaw (n.): Old English utlaga "one put outside the law" (and thereby deprived of its benefits and protections), from a Scandinavian source, cf. Old Norse utlagi (n.) "outlaw," from utlagr (adj.) "outlawed, banished," from ut "out" (see out (adv.)) + *lagu, plural of lag "law" (see law).
[G]if he man to deaðe gefylle, beo he þonne utlah ["Laws of Edward & Guthrum," c.924]
Meaning "one living a lawless life" is first recorded 1880. As an adjective from Old English.
outlaw (v.): Old English utlagian "to outlaw, banish," from utlaga "an outlaw" (see outlaw (n.)). Related: Outlawed; outlawing.
outlawry (n.): late 14c., from Anglo-French utlagerie, a hybrid from Old English utlaga (see outlaw (n.)) + -ary.
outlay (n.): "act or fact of laying out (especially money) or expending," 1798, originally Scottish, from out (adv.) + lay (v.).
outlet (n.): mid-13c., "a river mouth," from out + let (v.). Electrical wiring sense is attested from 1892. Meaning "a retail store" is attested from 1933. Figurative sense "means of relief or discharge" is from 1620s.
outlier (n.): c.1600, "stone quarried and removed but left unused," from out + lie (v.2). Transferred meaning "outsider" is recorded from 1680s; "anything detached from its main body" is from 1849; geological sense is from 1833.
outline (n.): 1660s, "lines by which a figure is delineated," from out + line (v.). Meaning "rough draft in words" is from 1759.
outline (v.): 1790, "to draw in outline," from outline (n.). Meaning "to describe in general terms" is from 1855. Related: Outlined; outlining.
outlive (v.): "to live longer than," late 15c., from out (adv.) + live (v.). Related: Outlived; outliving.
outlook (n.): "mental view or survey," 1742, from out (adv.) + look (v.). The meaning "prospect for the future" is attested from 1851. Earliest sense was "a look-out" (1660s). The literal sense of "vigilant watch, act or practice of looking out" (1815) is rare; look-out being used instead for this.
outlying (adj.): "outside certain limits," 1660s, from out + present participle of lie (v.2). Meaning "remote from the center" is first recorded 1680s.
outmoded (adj.): "no longer in fashion, out of date," 1894, from out + mode (q.v.); perhaps formed on model of French démoder.
outness (n.): 1709, from out (adv.) + -ness.
outnumber (v.): "to number more than," 1660s, from out + number (v.). Related: Outnumbered; outnumbering.
outpatient (n.): also out-patient, 1715, "person who is treated at a hospital but not admitted," from out + patient (n.). The adjective is first recorded 1879.
outperform (v.): 1960, from out (adv.) + perform. Related: Outperformed; outperforming.
outpost (n.): 1757, "military position detached from the main body of troops," from out + post (n.2). Originally in George Washington's letters. Commercial sense of "trading settlement near a frontier" is from 1802. Phrase outpost of Empire (by 1895) in later use often echoes Kipling.
outpouring (n.): mid-15c., "a pouring out," from out + infinitive of pour (v.). From 1757 as "action of pouring out," originally transferred, of things spiritual; sense of "that which is poured out" (again, usually transferred) is from 1827.
output (n.): 1839, from out + put (v.). Till c.1880, a technical term in the iron and coal trade [OED]. The verb is attested from mid-14c., originally "to expel;" meaning "to produce" is from 1858.
outrage (n.): c.1300, "evil deed, offense, crime; affront, indignity," from Old French outrage "harm, damage; insult; criminal behavior; presumption, insolence, overweening" (12c.), earlier oltrage (11c.), from Vulgar Latin *ultraticum "excess," from Latin ultra "beyond" (see ultra-). Etymologically, "the passing beyond reasonable bounds" in any sense; meaning narrowed in English toward violent excesses because of folk etymology from out + rage. Of injuries to feelings, principles, etc., from 1769.
outrage (v.): c.1300, "to go to excess, act immoderately," from outrage (n.). From 1580s with meaning "do violence to." Related: Outraged; outraging.
outrageous (adj.): c.1300, "excessive, extravagant," from Old French outrageus, outrajos "immoderate, excessive, violent, lawless" (Modern French outrageux), from outrage, oltrage (see outrage). Meaning "flagrantly evil" is late 14c.; modern teen slang usages of it unwittingly approach the original and etymological sense of outrage. Related: Outrageously; outrageousness.
outrank (v.): 1829, from out (adv.) + rank. Related: Outranked; outranking.