[zel-uh s]


full of, characterized by, or due to zeal; ardently active, devoted, or diligent.

Origin of zealous

From the Medieval Latin word zēlōsus, dating back to 1520–30. See zeal, -ous
Related formszeal·ous·ly, adverbzeal·ous·ness, nounnon·zeal·ous, adjectivenon·zeal·ous·ly, adverbnon·zeal·ous·ness, nounun·der·zeal·ous, adjectiveun·der·zeal·ous·ly, adverbun·der·zeal·ous·ness, nounun·zeal·ous, adjectiveun·zeal·ous·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for zealousness

Historical Examples of zealousness

  • In his zealousness Mr. Dolman might anger her husband, then his logic would avail little.


    W. A. Fraser

  • Into eyes and lips alike came something else—something touched with the zealousness of aspiration.

    When 'Bear Cat' Went Dry

    Charles Neville Buck

  • With these two cold, stern men to nod approval at his zealousness, he went to greater lengths than he might otherwise have done.

    Joel: A Boy of Galilee

    Annie Fellows Johnston

British Dictionary definitions for zealousness



filled with or inspired by intense enthusiasm or zeal; ardent; fervent
Derived Formszealously, adverbzealousness, noun
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

Word Origin and History for zealousness



1520s, from Medieval Latin zelosus (source of Italian zeloso, Spanish celoso), from zelus (see zeal). Related: Zealously, zealousness.

Online Etymology Dictionary, © 2010 Douglas Harper