He joined the league last year. 用英语解释句子怎么解释?

他去年加入了社团.
百度词典
league英音：[li:g]美音：[lig]
以下结果由译典通提供词典解释
名词 n. [C]
1.同盟,联盟
Several nations formed a defense league.
几个国家结成了防御联盟.
2.盟约
make a league
订立盟约
3.联合会,社团;【体】(球队)俱乐部联合会
The local schools formed a football league.
当地几所学校组建了足球联合会.
4.种类;范畴;等级
They are not in the same league.
他们的水平有高低.
及物动词 vt.
1.使结盟;使联合
countries that are leagued together
结盟的国家
不及物动词 vi.
1.结盟;联合