Learner's definition of LEADER
1 : someone or something that leads others: such asa : someone who guides other people b : someone or something that is ahead of others in a race or competition
c : a powerful person who controls or influences what other people do: a person who leads a group, organization, country, etc.
She was the leader for most of the race, but she eventually finished second.
He is the league leader in home runs. [=he has the most home runs in the league]
the leader board [=the list of players who are leading a golf tournament]
d : a person, group, or organization that is the best or most successful in some activity
The class focused on the great religious/political leaders of the last century.
the leader of an army
a gang leader
a leader of the antiwar movement
Some people are leaders, and some people are followers.
He's a born/natural leader. [=someone who has qualities that a good leader has]
2 a : a person who leads a musical groupspecifically US : the conductor of an orchestra b British