/ Dictionary / Index H harmattan: Meaning and Definition of Find definitions for: har•mat•tan Pronunciation: (här"mu-tan'), [key] — n. (on the west coast of Africa) a dry, parching land breeze, charged with dust. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: harmattan (Thesaurus) harm harmful Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language