/ Dictionary / Index U ustulation: Meaning and Definition of Find definitions for: us•tu•la•tion Pronunciation: (us"chu-lā'shun), [key] — n. the act of scorching or burning. the roasting or drying of moist substances. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ustulate usu. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language