/ Dictionary / Index C commutator group: Meaning and Definition of Find definitions for: com'mutator group" Pronunciation: [key] — Math. Math. the subgroup of a given group, which consists of all the commutators in the group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. commutator commute Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language