/ Dictionary / Index A affine group: Meaning and Definition of Find definitions for: af'fine group" Pronunciation: [key] — Math. Math. the group of all affine transformations of a finite-dimensional vector space. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. affine geometry affinitive Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language