/ Dictionary / Index A axiom of choice: Meaning and Definition of Find definitions for: ax'iom of choice' Pronunciation: [key] — Math. Math. the axiom of set theory that given any collection of disjoint sets, a set can be so constructed that it contains one element from each of the given sets. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. axiomatic axiom of countability Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language