/ Dictionary / Index I intumescence: Meaning and Definition of Find definitions for: in•tu•mes•cence Pronunciation: (in"too-mes'uns, -tyoo-), [key] — n. a swelling up, as with congestion. the state of being swollen. a swollen mass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: intumescence (Thesaurus) intumesce inturn Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language