supporter (n.)a person who backs a politician or a team etc.;
all their supporters came out for the game
supporter (n.)someone who supports or champions something;
supporter (n.)a person who contributes to the fulfillment of a need or furtherance of an effort or purpose;
supporter (n.)a band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve);
supporter (n.)a support for the genitals worn by men engaging in strenuous exercise;