Meaning of AFFINE in English

I. aˈfīn, əˈ- noun

( -s )

Etymology: Middle French affin, from affin, adjective

: a relative by marriage (as one's wife's brother)

II. transitive verb

( -ed/-ing/-s )

Etymology: French affiner, from a- (from Latin ad- ) + fin fine, refined — more at fine

: to subject (raw sugar) to affination

III. adjective

Etymology: French affin, akin, connected, from Latin affinis related by marriage — more at affinity

mathematics : preserving finiteness [as in the transformation y = ax + b ( a not zero), where to every finite value of the variable x there corresponds a finite value of the variable y, and vice versa]

• af·fine·ly adverb

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.