Giving help or encouragement to someone or something.
Supporting is usually a positive thing. It means helping someone or something to be better or stronger.
Examples:
She is supporting her friend.
We are supporting the team.
He is supporting the plant with a stick.
The big tree is supporting the little tree.
The strong wind is supporting the kite.
I am supporting you with my hands.
Acting in a play or movie in a role that is not the main one.
Supporting in a play or movie is still important, but not the most important.
Examples:
She got the supporting role in the play.
He is an actor in a supporting role.
The supporting actors are very good too.
The supporting characters make the story better.
The supporting actress is very kind.
The supporting actor is very funny.