A definite (restricted) number (of things).

A number, aggregation, or collection of persons or things. Cf. number, n. 9a.

In the sale of various commodities, often used for a definite number greater than five score; see quots.: esp. great (also long) hundred (usually) =…

A fixed numerical quantity, of uncertain size (perhaps a quarter of one hundred, 25). Obsolete. rare.

= than, conj.

Chiefly Mathematics. In form n or occasionally N, and often italicized. An unspecified or variable (usually integral) number. Cf. nth, adj.

Something with a known value, character, etc.; = known quantity n. at compounds. Frequently contrasted with unknown.