Etymology
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book (n.)
Origin and meaning of book

Old English boc "book, writing, written document," generally referred (despite phonetic difficulties) to Proto-Germanic *bōk(ō)-, from *bokiz "beech" (source also of German Buch "book" Buche "beech;" see beech), the notion being of beechwood tablets on which runes were inscribed; but it may be from the tree itself (people still carve initials in them).

Latin and Sanskrit also have words for "writing" that are based on tree names ("birch" and "ash," respectively). And compare French livre "book," from Latin librum, originally "the inner bark of trees" (see library). The Old English word originally meant any written document. The sense gradually narrowed by early Middle English to "a written work covering many pages fastened together and bound," also "a literary composition" in any form, of however many volumes. Later also "bound pages," whether written on or not. In 19c. it also could mean "a magazine;" in 20c. a telephone directory.

From c. 1200 as "a main subdivision of a larger work." Meaning "libretto of an opera" is from 1768. A betting book "record of bets made" is from 1812. Meaning "sum of criminal charges" is from 1926, hence slang phrase throw the book at (1932). Book of Life "the roll of those chosen for eternal life" is from mid-14c. Book of the month is from 1926. To do something by the book "according to the rules" is from 1590s.

The use of books or written charters was introduced in Anglo-Saxon times by the ecclesiastics, as affording more permanent and satisfactory evidence of a grant or conveyance of land than the symbolical or actual delivery of possession before witnesses, which was the method then in vogue. [Century Dictionary]
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book (v.)
Origin and meaning of book
Old English bocian "to grant or assign by charter," from book (n.). Meaning "to enter into a book, record" is early 13c. Meaning "to register a name for a seat or place; issue (railway) tickets" is from 1841; "to engage a performer as a guest" is from 1872. U.S. student slang meaning "to depart hastily, go fast" is by 1977, of uncertain signification. Related: Booked; booking.
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book-plate (n.)
"label indicating ownership, pasted in or on a book," 1791, from book (n.) + plate (n.).
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book-end (n.)
"prop for keeping books in position," 1907, from book (n.) + end (n.).
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field-book (n.)
naturalist's notebook for observations in the field, 1848, from field (n.) + book (n.).
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story-book (n.)
1711, from story (n.1) + book (n.). As an adjective from 1844.
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school-book (n.)
also schoolbook, 1745, from school (n.1) + book (n.).
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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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day-book (n.)

also daybook, "book for recording events and transactions of the day," 1570s, from day (n.) + book (n.).

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match-book (n.)

also matchbook, in reference to a folder holding fire-starting safety matches, 1913, from match (n.1) + book (n.).

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