/ Dictionary / Index S stickum: Meaning and Definition of Find definitions for: stick•um Pronunciation: (stik'um), [key] — n. Informal. any adhesive substance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stick-to-it-ive stickup 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