master (v.)

c. 1200, maistren, "to get the better of, prevail against; reduce to subjugation," from master (n.) and also from Old French maistriier, Medieval Latin magistrare. Meaning "acquire complete knowledge of, overcome the difficulties of, learn so as to be able to apply or use" is from 1740s. Related: Mastered; mastering.

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copy (n.)

mid-14c., "written account or record," from Old French copie (13c.) and directly from Medieval Latin copia "reproduction, transcript," from Latin copia "an abundance, ample supply, profusion, plenty," from assimilated form of com "with" (see com-) + ops (genitive opis) "power, wealth, resources," from PIE root *op- "to work, produce in abundance."

Sense extended 15c. to any specimen of writing, especially MS given to a printer to be reproduced in type (Caxton, late 15c.). Meaning "a duplication, imitation, or reproduction" written or otherwise is from late 14c. Meaning "one of a set of reproductions containing the same matter" is from 1530s.

Copy-boy, one who takes copy from the writer to the printer, is from 1888. The newspaper copy-desk, where copy is edited for printing, is from 1887; copy-editor is attested from 1889.

The "copy desk" is the managing editor's literary inspection field, his last check by which the work of all editorial departments is gauged, the final balance where the brain product of the entire working force of the paper is weighed and judged. [The Journalist, May 21, 1892]
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copy (v.)

late 14c., "make a copy of, duplicate" (a text or document), from Old French copier (14c.) and directly from Medieval Latin copiare "to transcribe," originally "to write in plenty," from Latin copia "plenty" (see copy (n.)). Hence, "to write an original text many times."

Figurative sense of "to imitate, to follow as an example" is attested from 1640s. Of computer data, by 1953. Meaning "send a copy (of a letter, later e-mail, etc.) to a third party" is attested by 1983. Related: Copied; copying.

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master (n.)
Origin and meaning of master

late Old English mægester "a man having control or authority over a place; a teacher or tutor of children," from Latin magister (n.) "chief, head, director, teacher" (source of Old French maistre, French maître, Spanish and Italian maestro, Portuguese mestre, Dutch meester, German Meister), contrastive adjective ("he who is greater") from magis (adv.) "more," from PIE *mag-yos-, comparative of root *meg- "great." The form was influenced in Middle English by Old French cognate maistre.

From late 12c. as "man eminently or perfectly skilled in something," also "one who is chief teacher of another (in religion, philosophy, etc.), religious instructor, spiritual guide." Sense of "master workman or craftsman, workman who is qualified to teach apprentices and carry on a trade on his own account" is from c. 1300. The meaning "one charged with the care, direction, oversight, and control of some office, business, etc." is from mid-13c.; specifically as "official custodian of certain animals kept for sport" early 15c. (maister of þe herte houndes; the phrase master of the hounds is attested by 1708). As a title of the head or presiding officer of an institution, late 14c.; as "captain of a merchant vessel" early 14c.

In the broadest sense, "one who has power to control, use, or dispose (of something or some quality) at will," from mid-14c. Also from mid-14c. as "one who employs another or others in his service" (in which sense the correlative word was servant, man, or apprentice); also "owner of a living creature" (a dog, a horse, also, in ancient contexts a slave); paired with slave in the legal language of the American colonies by 1705 in Virginia.

In academic sense "one who has received a specific degree" (translating Medieval Latin magister) it is attested from mid-13c., originally "one who has received a degree conveying authority to teach in the universities;" master's degree, originally a degree giving one authority to teach in a university, is from late 14c.

Also used in Middle English of dominant women. From 1530s as "male head of a household." As a title or term of respect or rank, mid-14c. As a title prefixed to the name of a young gentleman or boy of the better class not old enough to be called Mr., short for young master (late 16c.). Sense of "chess player of the highest class at national or international level" is by 1894. Meaning "original of a recording" is by 1904.

As an adjective from late 12c. Master-key, one that will open ("master") a number of locks so differently constructed that the key proper to each will open none of the others" is from 1570s. Master race "race of people considered to be pre-eminent in greatness or power" (typical in reference to Nazi theories of the Aryan race, perhaps based on German Herrenvolk) is by 1935. From 1530 as "artist of distinguished skill;" old masters is attested by 1733.

Master bedroom, "bedroom designed for the use of the owner of the property," as opposed to bedrooms for children or guests, is by 1919 in U.S. home-builders publications (e.g. Building Age, April 1919).  It seems to be based on the English master's bedroom (by 1903) "bedroom of a headmaster or other master at an English boarding school or other similar institution."

The top floor was treated much the same as the two lower ones. Here the closet was made just a bit larger so as to allow for a bathtub, thus pushing the partition forward, making the front room less deep than the rooms below, yet paradoxically larger, because it takes in the whole front of the house. This is what is known in English advertisements as the "Master's bedroom." [The House Beautiful, June 1921] 
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copy-book (n.)

"book in which things are written or printed for learners to imitate," 1580s, from copy (v.) + book (n.).

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school-master (n.)

also schoolmaster, "man who presides over a school," c. 1200, scole-maister; see school (n.1) + master (n.).

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master-work (n.)

c. 1600, "an action of chief importance;" 1610s, "a work of pre-eminent merit, a masterpiece," from master (n.) + work (n.). Probably based on a Dutch or German model (compare Middle Low German mesterwerk, German Meisterwerk).

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carbon-copy (n.)
1895, from carbon (paper) + copy (n.). A copy on paper made using carbon-paper (paper faced with carbon, used between two sheets for reproduction on the lower of what is drawn or written on the upper). The figurative sense is from 1944. Also as a verb, "send a carbon copy (of something)," and as such often abbreviated c.c.
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master-stroke (n.)

"masterly line or touch" (especially in painting), 1670s, a sense now obsolete, from master (n.) + stroke (n.). Probably based on a Dutch or German model. In general use, "a masterly achievement, a wonderfully clever or successful action" (1711).

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master-mind (n.)

1720, "an outstanding intellect," from master (n.) + mind (n.). Meaning "head of a criminal enterprise" is attested by 1872. As a verb (also mastermind), "to engage in the highest level of planning and execution of a major operation," from 1940. Related: Masterminded; masterminding.

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