n. One-twentieth of a ream of paper; a collection of twenty-four or twenty-five sheets of paper of the same size and quality, unfolded or having a single fold.n. A set of leaves which are stitched together, originally a set of four pieces of paper (eight leaves, sixteen pages). This is most often a single signature (i.e. group of four), but may be several nested signatures.n. A book, poem, or pamphlet.v. To prepare quires by stitching together leaves of paper.n. A choir.n. The architectural part of a church in which the choir resides, between the nave and the sanctuary.v. To sing in concert.