/dʒɔɪn ||; dʒɔɪn/verb1 [T] join A to B;join A and B (together) to fasten or connect one thing to another 联结；连接: The Channel Tunnel joins Britain to Europe. 海峡隧道将英国与欧洲大陆联结起来。The two pieces of wood had been carefully joined together. 这两块木板已被小心接合。We've knocked down the wall and joined the two rooms into one. 我们拆掉了中间那道墙，把两个房间连成一个。
2 [I,T] join (up) (with sb/sth) to meet or unite (with sb/sth) to form one thing or group 与（某人）会合；与…合而为一: Do the two rivers join (up) at any point? 这两条河有没有在什么地方汇流？Where does this road join the motorway? 这条路在什么地方接上高速公路？Would you like to join us for a drink? 跟我们一起喝一杯，好不好？
3 [T] to become a member of a club or organization 加入（俱乐部或组织）: I've joined an aerobics class. 我参加了健身操班。He joined the company three months ago. 他三个月前进那家公司。
4 [T] to take your place in sth or to take part in sth 参加；加入…的行列: We'd better go and join the queue if we want to see the film. 我们要看电影的话，最好现在就去排队。Come downstairs and join the party. 到楼下来参加聚会吧。
5 [I,T] join (with) sb in sth/in doing sth/to do sth;join together in doing sth/to do sth to take part with sb (often in doing sth for sb else) 跟某人一起做（常指为了另一人） · Everybody here joins me in wishing you the best of luck in your new job. 这里所有人和我都祝你新工作胜任愉快。The whole school joined together to sing the school song. 全校上下齐声唱校歌。
join forces (with sb)→
FORCE¹
join in (sth/doing sth) to take part in an activity 参加；参与:
Everyone started singing but Frank refused to join in. 人人都开始唱歌，就弗兰克不愿参加。 join up to become a member of the army, navy or air force 参军；入伍；从军