from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Persevering and constant in effort or application; assiduous. See Synonyms at busy.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Diligent in application or pursuit; constant, steady, and persevering in business or in endeavors to effect an object; steadily industrious; assiduous.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Diligent in application or pursuit; constant, steady, and persevering in business, or in endeavors to effect an object; steadily industrious; assiduous.

from The Century Dictionary and Cyclopedia

  • Diligent in application or in the pursuit of an object; constant, steady, and persevering; steadily industrious; assiduous.
  • Synonyms See assiduity.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. marked by care and persistent effort


From Latin sēdulus, from sēdulō, zealously : , without; see s(w)e- in Indo-European roots + dolō, ablative of dolus, trickery (probably from Greek dolos, cunning; see del-2 in Indo-European roots).
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin sedulus ("diligent") (Wiktionary)


  • And now a very strange argument ensues, me versus the Lebanese porter, because, I now understand, I am putting this guy, who barely speaks English, in a terrible kind of sedulous service double bind, a paradox of pampering:

    Story pick: Funniest vacation story ever (that didn't appear in National Lampoon)

  • Shortly after the success of the original novel Disney announced that a book series entitled Stories From East High would be published in February 2007 with a Hi, a harry is much less physic than this sedulous From. » Stories From East High birthday – kids gift harry little

  • It can seem as if he is not a racing driver at all, but an actor, playing a role with sedulous care.

    McLaren's Jenson Button still inspired by the magic of Monaco

  • It had been her care which provided me a companion in Clerval -- and yet a man is blind to a thousand minute circumstances, which call forth a woman's sedulous attention.

    Chapter 18

  • James's executor was Alice James, the wife of Henry's older brother, the philosopher William James, and the woman who had nursed him with sedulous care through his last illness.

    The Afterlife of the Lion

  • Is it true that some of the symptoms of Swine Flue are sedulous grunting, desire to lie in the mud, and the smell of bacon frying brings tears to ones eyes?

    Texas Declares Feral Hogs Not Tied To Swine Flu

  • Our usual interjection again to a sedulous hosts, Messrs. Friedman, Madeira as good as Pope.

    Archive 2009-11-01

  • And a disciplined population, that rose at last by sedulous begging on birthdays and all convenient occasions to well over two hundred, of lead sailors and soldiers, horse, foot and artillery, inhabited this world.

    Archive 2010-04-01

  • Vocabulary sedulous - diligent in application or pursuit


  • As a part of my program of sedulous application, I began to haunt the Columbia University library, where I had been sent by a teacher to research an art history project.

    Dreaming in French


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  • We all know how hard the man tries
    But, oh, the strange stories he buys!
    While Ernest is sedulous
    He's hopelessly credulous.
    He can't tell the truth from the lies.

    For more on the naive (but very useful) Ernest Bafflewit see cahot, methinks and cinquecento.

    May 10, 2014

  • found in Merriam Webster's Dictionary pg 72

    November 15, 2010

  • This word was chosen as Wordnik word of the day.

    November 11, 2009