[] an organization of workers, usually in a particular industry, that exists to protect their interests, improve conditions of work, etc.工会◆a trade union representing car workers代表汽车工人的工会◆the trade union movement工会运动⨁to belong to / form / set up / join a trade union属于／成立／建立／加入工会⨁a trade union activist / leader / member / official / representative工会积极分子／领导人／会员／干事／代表▸ˌtrade ˈunionism