Nonperformance Non`per*form"ance, n. Neglect or failure to perform., Performable Per*form"a*ble, a. Admitting of being performed, done, or executed; practicable., Performance Per*form"ance, n. The act of performing; the carrying into execution or action; execution; achievement; accomplishment; representation by action; as, the performance of an undertaking of a duty. Promises are not binding where the performance is impossible. --Paley. 2. That which is performed or accomplished; a thing done or carried through; an achievement; a deed; an act; a feat; esp., an action of an elaborate or public character. ``Her walking and other actual performances.' --Shak. ``His musical performances.' --Macaulay. Syn: Completion; consummation; execution; accomplishment; achievement; production; work; act; action; deed; exploit; feat., Performer Per*form"er, n. One who performs, accomplishes, or fulfills; as, a good promiser, but a bad performer; especially, one who shows skill and training in any art; as, a performer of the drama; a performer on the harp.