/ Dictionary / Index S step-up: Meaning and Definition of Find definitions for: step-up Pronunciation: (step'up"), [key] — adj. effecting an increase. serving to increase voltage: a step-up transformer. (of a lease) allowing for gradual rent increases to the highest amount permissible. —n. an increase or rise in the rate or quantity of something. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: step-up (Thesaurus) step turn stepwise Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language