Misperformance

[per-fawr-muh ns] /pərˈfɔr məns/

noun
1.
a musical, dramatic, or other entertainment presented before an audience.
2.
the act of 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 .
7.
the manner in which or the efficiency with which something reacts or fulfills its intended purpose.
8.
Linguistics. 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.
Compare (def 6).
/pəˈfɔːməns/
noun
1.
the act, process, or art of performing
2.
an artistic or dramatic production: last night’s performance was terrible
3.
manner or quality of functioning: a machine’s performance
4.
(informal) mode of conduct or behaviour, esp when distasteful or irregular: what did you mean by that performance at the restaurant?
5.
(informal) any tiresome procedure: what a performance dressing the children to play in the snow!
6.
any accomplishment
7.
(linguistics) (in transformational grammar) the form of the human language faculty, viewed as concretely embodied in speakers Compare competence (sense 5), langue, parole (sense 5)
n.

late a5c., “accomplishment” (of something), from perform + -ance. Meaning “a thing performed” is from 1590s; that of “action of performing a play, etc.” is from 1610s; that of “a public entertainment” is from 1709. Performance art is attested from 1971.