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.

Uncommon form of choir (“one quarter of a cruciform church, or the architectural area of a church used by the choir, often near the apse”).

Archaic spelling of choir (“group of people who sing together”).

Poetic spelling of choir (“to sing in concert”).

present active infinitive of queō

Source: wiktionary.org