variety Noun A rank in a taxonomic classification, below species and subspecies.

variety Noun The total number of distinct states of a system.

variety Noun Logarithm of the base 2 of the total number of distinct states of a system.

variety Noun a term used for a specific form of a language, neutral to whether that form is a dialect, accent, register, etc. and to its prestige level.

variety Noun The class of all algebraic structures of a given signature satisfying a given set of identities.