illocutionary act
Definition - A speech act that either asserts, suggests, demands, warns, promises, vows, or requests.

For example, if when dining you say "Please, pass me the catsup?", you are:

(1) performing the illocutionary act of requesting catsup
(2) performing the locutionary act of saying a sentence, and
(3) performing the perlocutionary act of causing somebody to pass you the catsup.

Etymology -
The term was introduced by the philosopher John L. Austin.

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