(1):
(v. i.) To do, execute, or accomplish something; to acquit one's self in any business; esp., to represent sometimes by action; to act a part; to play on a musical instrument; as, the players perform poorly; the musician performs on the organ.
(2):
(v. t.) To represent; to act; to play; as in drama.
(3):
(v. t.) To carry through; to bring to completion; to achieve; to accomplish; to execute; to do.
(4):
(v. t.) To discharge; to fulfill; to act up to; as, to perform a duty; to perform a promise or a vow.