What is the meaning of supporter?

noun

• A person who backs a politician or a team etc..
  • usage: "all their supporters came out for the game"; "they are friends of the library"
  • synonyms: protagonist, champion, admirer, booster, friend
• Someone who supports or champions something.
  • synonyms: patron, sponsor
• A person who contributes to the fulfillment of a need or furtherance of an effort or purpose.
  • usage: "my invaluable assistant"; "they hired additional help to finish the work"
  • synonyms: assistant, helper, help
• A band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve.
  • synonyms: garter
• A support for the genitals worn by men engaging in strenuous exercise.
  • synonyms: athletic supporter, suspensor, jockstrap, jock