/ Dictionary / Index A affine geometry: Meaning and Definition of Find definitions for: af'fine geom'etry Pronunciation: [key] the branch of geometry dealing with affine transformations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. affined affine group 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