[ sej-uh-luhs ]
/ ˈsɛdʒ ə ləs /


diligent in application or attention; persevering; assiduous.
persistently or carefully maintained: sedulous flattery.

Origin of sedulous

1530–40; < Latin sēdulus, adj. derivative of the phrase sē dolō diligently, literally, without guile; replacing sedulious (see sedulity, -ous)

Related forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sedulous

British Dictionary definitions for sedulous


/ (ˈsɛdjʊləs) /


constant or persistent in use or attention; assiduous; diligent

Derived Forms

sedulity (sɪˈdjuːlɪtɪ) or sedulousness, nounsedulously, adverb

Word Origin for sedulous

C16: from Latin sēdulus, of uncertain origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012