performative[pər fôr′mə tiv]
performative definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
of or having to do with performance; specif., designating or having to do with a statement that functions as an action and, hence, is neither true nor false: “I apologize” is a performative utterance
performative definition by American Heritage Dictionary
Relating to or being an utterance that peforms an act or creates a state of affairs by the fact of its being uttered under appropriate or conventional circumstances, as a justice of the peace uttering I now pronounce you husband and wife at a wedding ceremony, thus creating a legal union, or as one uttering I promise, thus performing the act of promising.noun
A performative utterance.