/ Dictionary / Index A apex: Meaning and Definition of Find definitions for: a•pex Pronunciation: (ā'peks), [key] — pl. a•pex•es, a•pi•ces the tip, point, or vertex; summit. climax; peak; acme: His election to the presidency was the apex of his career. See APEX Pronunciation: (ā'peks), [key] a type of international air fare offering reduced rates for extended stays that are booked in advance. [1970–75; A(dvance) P(urchase) Ex(cursion)] Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: apex (Thesaurus) apetalous Apgar Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language