Leadership : The Definition

Leadership has been described as the “process of social influence in which one person is able to enlist the aid and support of others in the accomplishment of a common task”. A definition more inclusive of followers comes from Alan Keith of Genentech who said "Leadership is ultimately about creating a way for people to contribute to making something extraordinary happen." Students of leadership have produced theories involving traits, situational interaction, function, behavior, power, vision and values, charisma, and intelligence among others.

source: http://www.wikipedia.org