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Definition of zealous

zealous

/ˈzɛl.əs/
zeal · ous
Adverb:zealously
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zealous Lexical Profile

zealous Game Scores & Validity

• adjective

1

Having or showing great energy, passionate devotion, or fervent enthusiasm in pursuit of a cause, ideal, or objective.

Example

"The organization relies on a team of zealous volunteers to restore the local wetlands."

Synonyms
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Antonyms
View all antonyms for zealous

Word Nuance & Usage

Do not confuse 'zealous' (passionate and devoted to a cause) with 'jealous' (envious or fiercely protective), even though both words share the same ancient Greek root.

• Rhymes for zealous

• Nearby Words

zeal
zealot
zealotry
zealous
zealously
zebra
zebra bullhead shark

Word Origin & Etymology

Entered English in the 16th century from Medieval Latin 'zelosus', from Late Latin 'zelus' (zeal), which derives from Ancient Greek 'zelos' (ardor, eager rivalry, or emulation).

Cite this Entry

Wordmom. (2026). Definition of Zealous. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/zealous
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