/ Dictionary / Index S slumberous: Meaning and Definition of Find definitions for: slum•ber•ous Pronunciation: (slum'bur-us, slum'brus), [key] — adj. sleepy; heavy with drowsiness, as the eyelids. causing or inducing sleep. pertaining to, characterized by, or suggestive of slumber. inactive or sluggish; calm or quiet. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: slumberous (Thesaurus) slumberland slumber party 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