a person who leads; a business, design, country etc that has first place (in a competition, set of statistics etc)
person who guides
Cases of word usage
1) a leader (captain)
2) a political leader who tries to gain support by speeches appealing to the feedings instead of to reason (demagogue)
3) a follower of any leader of religious thought, art, learning etc (especially one of the twelve personal followers of Jesus Christ) (disciple)
4) a faithful supporter, especially one who obeys without question the orders of a leader (henchman)
5) a wealthy and powerful leader of business or industry (magnate)
6) to be a picture, sign, symbol or example of (of a person, thing); to act officially for (a person), e.g. as a lawyer, member of parliament, union leader etc (represent)