/ Dictionary / Index S Somnus: Meaning and Definition of Find definitions for: Som•nus Pronunciation: (som'nus), [key] — n. the ancient Roman god of sleep, a son of Night and brother of Death. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. somnolent Somoza 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