What is the meaning of Quire?

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.

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.

A book, poem, or pamphlet.

To prepare quires by stitching together leaves of paper.

One quarter of a cruciform church, or the architectural area of a church, generally used by the choir; often near the apse.

Archaic form of choir (group of people who sing together).

To sing in concert.

present active infinitive of queō

Source: wiktionary.org