1 a person who is a manager or in charge of sth 领导人;领袖:
a weak/strong leader软弱的╱强而有力的领导人She is a natural leader (= she knows how to tell other people what to do).她有当领袖的天赋。
2 the person or thing that is best or in first place 领先的人或事物:
The leader has just finished the third lap.领先的选手刚刚跑完了第三圈。The new shampoo soon became a market leader.这种新上市的洗发剂很快成了销量冠军。