To effect; execute; accomplish; achieve; carry on or out; do: as, to perform, an act of kindness or a deed of daring; to perform a day's labor; to perform an operation in surgery or in arithmetic.To carry out or do whatever is demanded or required by (duty, a vow, etc.); execute the provisions, commands, or requirements of; put in execution; discharge; fulfil: as, to perform one's duty; to perform a vow; to perform a covenant.To render; do.To act or represent on or as on the stage: as, to perform the part of Hamlet.To make up; constitute; complete.To afford; furnish.To sing, or render on a musical instrument.To act; do or execute something.To act a part; go through or complete any work; especially, to sing or play on a musical instrument, represent a character on the stage, etc.