Breadcrumb Home > Dictionary > Index R rockoon: Meaning and Definition of Find definitions for: rock•oon Pronunciation: (rok'n, ro-kn'), [key] — n. a rocket launched from a balloon at a high altitude. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rock oil rock pigeon ✖ Related Content Daily Word Quiz: triumphalism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language