/ Dictionary / Index A antimony: Meaning and Definition of Find definitions for: an•ti•mo•ny Pronunciation: (an'tu-mō"nē), [key] — n. Chem. a brittle, lustrous, white metallic element occurring in nature free or combined, used chiefly in alloys and in compounds in medicine. Symbol: Sb; at. no.: 51; at. wt.: 121.75. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: antimony (Thesaurus) antimonsoon antimony 124 Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language