By the 18th century, however, it had completely diverged in meaning from jealous, signifying “warmly engaged or ardent on behalf of someone or something.” Today, zealous often carries a connotation …

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

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

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

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

Feb 21, 2026 · Adjective zealous (comparative more zealous or (uncommon, nonstandard) zealouser, superlative most zealous or (uncommon, nonstandard) zealousest) Full of zeal; ardent, fervent; …

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

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 outage for the …

Zealous definition: Filled with or motivated by zeal; fervent.

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.