(Homonym: aid).
Someone who acts as assistant; SYN. auxiliary.
A person who acts as an assistant; specifically; a military officer who acts as an assistant to a superior officer.
A person who contributes to the fulfillment of a need or furtherance of an effort or purpose; SYN. helper, help, supporter.
One who, or that which, backs; especially one who backs a person or thing in a contest.
One who, or that which, helps, aids, assists, or relieves.