the sheet from a book, map, collection of engravings, etc., which bears the title of the work or collection; (originally) spec. the first sheet…

An extra leaf inserted between the regular leaves of a book, usually blank to receive notes or additional matter; also transferred matter such as…

usually in plural, the blank leaves placed at the beginning and end of a book.

A blank leaf at the beginning or end, but esp. at the beginning, of a book; the blank leaf of a circular, etc.

Bookbinding. An inner sheet in a gathering.

Technical uses (see quots.; cf. French témoin).

a (usually blank) leaf inserted at one or other end of a bound book.

An unprinted leaf of a book.