What does it mean to be a leader?

Everyone has a different opinion on what qualities a leader should have and how they should act.My opinion is that a leader must have motivation because if a leader does not show and believe that a plan will work everyone he/she is directing will feel discouraged about what they are doing.Leaders must be accountable and be where they say there going to be.Being understanding is another trait a leader should exemplify.They must be able to see all sides and take everything into consideration. Finally my biggest must for a leader is that they must a have a vision or grand plan that they and the people under them are working towards.I feel that it introduces a drive to the team/group where everyone wants to see the plan carried out to the best of their ability.These are some of the  qualities I think every leader should have.