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[zel-uh s] /ˈzɛl əs/
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 forms
zealously, adverb
zealousness, noun
nonzealous, adjective
nonzealously, adverb
nonzealousness, noun
underzealous, adjective
underzealously, adverb
underzealousness, noun
unzealous, adjective
unzealously, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for zealously
Contemporary Examples
Historical Examples
  • One who is obstinately and zealously attached to an opinion that you do not entertain.

    The Devil's Dictionary Ambrose Bierce
  • Never was an estate kept so zealously private, and, does monsieur know?

    The Avenger E. Phillips Oppenheim
  • It was a thing that I had ever most zealously kept hidden, as already I have shown.

    The Shame of Motley Raphael Sabatini
  • If you do not work too zealously to save her, your reward will be the heart of him whom you love at last.

    Pretty Madcap Dorothy Laura Jean Libbey
  • An hundred servants hedged them about,––hedged them in as zealously as jailers.

    The Web of the Golden Spider

    Frederick Orin Bartlett
  • I can read them zealously but apparently do not get to the bottom and cannot retain what I do read.

    Psychotherapy Hugo Mnsterberg
British Dictionary definitions for zealously


filled with or inspired by intense enthusiasm or zeal; ardent; fervent
Derived Forms
zealously, adverb
zealousness, 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
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Word Origin and History for zealously



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

Online Etymology Dictionary, © 2010 Douglas Harper
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