/ Dictionary / Index H hexa-: Meaning and Definition of Find definitions for: hexa- Pronunciation: [key] a combining form meaning “six,” used in the formation of compound words: hexapartite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hex hexabasic Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language