Pronunciation: (pur-fôr'muns),[key] —n. 1. a musical, dramatic, or other entertainment presented before an audience.
2. the act of performing a ceremony, play, piece of music, etc.
3. the execution or accomplishment of work, acts, feats, etc.
4. a particular action, deed, or proceeding.
5. an action or proceeding of an unusual or spectacular kind: His temper tantrum was quite a performance. 6. the act of performing.
7. the manner in which or the efficiency with which something reacts or fulfills its intended purpose.
8. Ling.the actual use of language in real situations, which may or may not fully reflect a speaker's competence, being subject to such nonlinguistic factors as inattention, distraction, memory lapses, fatigue, or emotional state.Cf. competence (def. 6).