negation

Pronunciation: /nɪˈɡeɪʃn̩/

The English word “negation” has 5 meanings listed here.

noun

The act of negating something.
A denial or contradiction.
A proposition which is the contradictory of another proposition and which can be obtained from that other proposition by the appropriately placed addition, or insertion, of the word "not". (Or, in symbolic logic, by prepending that proposition with the symbol for the logical operator "not".)
The logical operation which obtains such (negated) propositions.
A negative particle; a word, particularly an adverb, with a negative meaning: for instance, no and not in English, nōn, haud and nē in Latin, οὐ and μή in ancient Greek.

From Middle English negacioun, from Old French negacion, from Latin negātiō (“a denial; negative word”). Morphologically negate + -ion.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.