The meaning of ZEALOUS is marked by fervent partisanship for a person, a cause, or an ideal : filled with or characterized by zeal. How to use zealous in a sentence.

ZEALOUS definition: full of, characterized by, or due to zeal; ardently active, devoted, or diligent. See examples of zealous used in a sentence.

Use the adjective zealous as a way to describe eagerness or enthusiastic activity. If you are too zealous in your efforts to decorate the house with Christmas lights, you might cause a power …

(Definition of zealous from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of zealous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 21, 2025 · zealous (comparative more zealous or (uncommon, nonstandard) zealouser, superlative most zealous or (uncommon, nonstandard) zealousest) Full of zeal; ardent, …

zealous, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

zealous (ˈzɛləs) adj filled with or inspired by intense enthusiasm or zeal; ardent; fervent ˈzealously adv

ZEALOUS meaning: feeling or showing strong and energetic support for a person, cause, etc. filled with zeal

Someone who is zealous spends a lot of time or energy in supporting something that they believe in very strongly. She was a zealous worker for charity.