zealous

Definitions

Having or showing great energy or enthusiasm in pursuit of a cause or an objective.

Marked by fervent partisanship for a person, a cause, or an ideal.

Examples

The zealous fans waited in line for hours just to catch a glimpse of their favorite actor.

She is a zealous advocate for environmental protection and spends her weekends volunteering for the cause.

Synonyms

passionate enthusiastic fervent ardent devoted eager fanatical

Antonyms

apathetic indifferent unenthusiastic lethargic halfhearted dispassionate unconcerned