Definition of performative adjective from the Oxford Advanced Learner's Dictionary

 

performative

 adjective
adjective
BrE BrE//pəˈfɔːmətɪv//
 
; NAmE NAmE//pərˈfɔːrmətɪv//
 
(grammar)
 
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when somebody uses a performative word or expression, for example ‘I promise’ or ‘I apologize’, they are also doing something (promising or apologizing) see also constative
See the Oxford Advanced American Dictionary entry: performative