To begin and carry through to completion; do: The surgeon performed the operation. To take action in accordance with the requirements of; fulfill: perform one's contractual obligations. To enact (a feat or role) before an audience. To give a public presentation of; present: My theater group performed a three-act play. To carry on; function: a car that performs well on curves. To fulfill an obligation or requirement; accomplish something as promised or expected. To portray a role or demonstrate a skill before an audience: The juggler performed atop a unicycle. To present a dramatic or musical work or other entertainment before an audience.