Breadcrumb Home > Dictionary > Index S stallion: Meaning and Definition of Find definitions for: stal•lion Pronunciation: (stal'yun), [key] — n. an uncastrated adult male horse, esp. one used for breeding. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: stallion (Thesaurus) stalling angle stalwart ✖ Related Content Daily Word Quiz: nomdeguerre Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language