/ Dictionary / Index H hypnosis: Meaning and Definition of Find definitions for: hyp•no•sis Pronunciation: (hip-nō'sis), [key] — pl. -ses an artificially induced trance state resembling sleep, characterized by heightened susceptibility to suggestion. hypnotism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hypnosis (Thesaurus) Hypnos hypnotherapy Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language