Read the dictionary definition of supporter. All definitions for this word.
1. a support for the genitals worn by men engaging in strenuous exercise
2. a band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve)
3. a person who contributes to the fulfillment of a need or furtherance of an effort or purpose
1. my invaluable assistant
2. they hired additional help to finish the work
4. someone who supports or champions something
5. a person who backs a politician or a team etc.
1. all their supporters came out for the game
2. they are friends of the library