A group of five; a compound entity having five component parts; a number divisible by five; †the number five (obsolete). In later use esp.: a line of…

figurative. A group or association of five related or dominant persons or things.

A group of five persons or things, esp. an ensemble of five musicians. Cf. quintet, n. 1b, 2.

A fivefold number or amount; a set of five things or parts; a group of five.

A set or arrangement of five things.

Any set or group of five persons or things, esp. a group of five persons engaged in the same activity.

= quintet, n. 2.

†A quintuplicate proportion (obsolete); a set of five identical or similar things; each member of such a set.