/ Dictionary / Index S Sem: Meaning and Definition of Find definitions for: Sem Pronunciation: (sem), [key] — n. Douay Bible. Shem. SEM Pronunciation: [key] — Optics. Optics. scanning electron microscope. Sem. Pronunciation: [key] Seminary. Semitic. sem. Pronunciation: [key] semicolon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Selznick semainier Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language