/ Dictionary / Index S sedulous: Meaning and Definition of Find definitions for: sed•u•lous Pronunciation: (sej'u-lus), [key] — adj. diligent in application or attention; persevering; assiduous. persistently or carefully maintained: sedulous flattery. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sedulous (Thesaurus) sedulity sedum Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language