/ Dictionary / Index S steepen: Meaning and Definition of Find definitions for: steep•en Pronunciation: (stē'pun), [key] — v.t., v.i. to make or become steeper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: steepen (Thesaurus) steep steeple 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