ac·tiv·ist /ˈæktɪvɪst/ ●○○ noun [countableC] REBELLION/REVOLUTIONsomeone who works hard doing practical things to achieve social or political change 积极分子;活动家political/gay/animal rights etc activist 政治活动家/积极支持同性恋的人/动物权利支持者等
—activist adjectiveadj [only before noun]