/ Dictionary / Index S semiconscious: Meaning and Definition of Find definitions for: sem•i•con•scious Pronunciation: (sem"ē-kon'shus, sem"ī-), [key] — adj. half-conscious; not fully conscious. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: semiconscious (Thesaurus) semiconductor semicrystalline Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language