/ Dictionary / Index F fumigant: Meaning and Definition of Find definitions for: fu•mi•gant Pronunciation: (fy'mi-gunt), [key] — n. any volatile or volatilizable chemical compound used as a disinfectant or pesticide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fumigant (Thesaurus) fumeuse fumigate Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language