/ Dictionary / Index S sleep-terror disorder: Meaning and Definition of Find definitions for: sleep'-ter•ror disor"der Pronunciation: (slēp'ter"ur). [key] — Psychiatry. Psychiatry. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sleep sofa sleep-wake cycle Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language