/ Dictionary / Index N noncombustible: Meaning and Definition of Find definitions for: non•com•bus•ti•ble Pronunciation: (non"kum-bus'tu-bul), [key] — adj. not flammable. —n. a noncombustible substance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: noncombustible (Thesaurus) noncombatant noncommissioned 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