/ Dictionary / Index S step rocket: Meaning and Definition of Find definitions for: step' rock"et Pronunciation: [key] — Rocketry. Rocketry. a multistage rocket that discards burned-out stages. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. steppingstone stepsister Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language