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