- constant or persistent in use or attention; assiduous; diligent
WordReference Random House Unabridged Dictionary of American English © 2026
sed•u•lous
(sej′ə ləs),USA pronunciation adj.
sed′u•lous•ly, adv.
sed′u•lous•ness, n.
- diligent in application or attention;
persevering;
assiduous. - persistently or carefully maintained:sedulous flattery.
- Latin sēdulus, adjective, adjectival derivative of the phrase sē dolō diligently, literally, without guile; replacing sedulious (see sedulity, -ous)
- 1530–40
sed′u•lous•ness, n.
- 1. constant, untiring, tireless.
Collins Concise English Dictionary © HarperCollins Publishers::
sedulous /ˈsɛdjʊləs/ adj
'sedulous' also found in these entries (note: many are not synonyms or translations):