a market 'leader' [=a product or company that is more successful than all competing products or companies]
He is the league 'leader' in home runs. [=he has the most home runs in the league]
He's a 'born/natural leader'. [=someone who has qualities that a good leader has]
(..) The landscape, the buildings... and defenses. He said it would be useful when we returned to avenge him. Are you saying he wanted you to be our leader? ~ Look! ~ What? What? Can't you see her? Who? See who? It's her. It is! (..)2017 TvShow: Vikings Title: Revenge Season: 4 Episode 18
(..) our peoples might never recover. Then I repeat, what shall we sacrifice? I think Lathgertha means, "who shall we sacrifice?" Who will be the leader of our great army? Maybe there won't be a single leader, but many. Father chose to take me with him to England. (..)2017 TvShow: Vikings Title: Revenge Season: 4 Episode 18