/ Dictionary / Index S semiautomatic: Meaning and Definition of Find definitions for: sem•i•au•to•mat•ic Pronunciation: (sem"ē-ô"tu-mat'ik, sem"ī-), [key] — adj. partly automatic. (of a firearm) automatically ejecting the cartridge case of a fired shot and loading the next cartridge from the magazine but requiring a squeeze of the trigger to fire each individual shot. —n. a self-loading rifle or other firearm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: semiautomatic (Thesaurus) semiautobiographical semiautonomous 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