/ Dictionary / Index S strep: Meaning and Definition of Find definitions for: strep Pronunciation: (strep), [key] — Informal. Informal. —n. streptococcus. —adj. streptococcal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: strep (Thesaurus) strenuous strepitous Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language