/ Dictionary / Index S Sr: Meaning and Definition of Find definitions for: Sr Pronunciation: [key] — Symbol, Chem. strontium. sr Pronunciation: [key] steradian. Sr. Pronunciation: [key] Senhor. Senior. Señor. Sir. Sister. [< L Soror] S.R. Pronunciation: [key] Sons of the Revolution. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sr (Thesaurus) sq. yd. Sra. Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language