/ Dictionary / Index E Euclidean group: Meaning and Definition of Find definitions for: Euclid'ean group' Pronunciation: [key] — Math. Math. the set of rigid motions that are also affine transformations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Euclidean geometry Euclidean space Related Content Daily Word Quiz: benevolent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language