'The Concise Oxford Dictionary' (1999) 10th Edition, Ed. Judy Pearsall, Oxford: Oxford University Press
definition of 'performance'
performance .n. 1 an act of performing a play, concert, or other form of entertainment. 2 a person's rendering of a dramatic role, song or piece of music. 3 informal a display of exaggerated behaviour; an elaborate fuss. 4 the action or process of performing a task or function. 5. the capabilities of a machine or product. 6. the extent to which an investment is profitable. 7 Linguistics an individual's actual use of a language, including hesitations and errors.