1 a group of sports clubs that compete with each other for a prize （体育竞赛的）联盟: the football league 足球联赛Which team is top of the league at the moment? 现在哪一队名列联赛榜首？

2 a group of people, countries, etc that join together for a particular purpose 联盟；同盟: the League of Nations 国际联盟

3 a level of quality, ability, etc 等级；档次: He is so much better than the others. They're just not in the same league. 论素质，他比其他人好得多。他们可不是同一档次的人。