Negation Definition

nĭ-gāshən
noun
The act or process of negating.
American Heritage
The act or an instance of denying; negative answer; denial.
Webster's New World
The lack or opposite of some positive character or quality.
Death is the negation of life.
Webster's New World
Something negative; nonentity.
Webster's New World

(logic, countable) A proposition which is the contradictory of another proposition and which can be obtained from that other proposition by the appropriately placed addition/insertion of the word "not". (Or, in symbolic logic, by prepending that proposition with the symbol for the logical operator "not".)

Wiktionary

Other Word Forms of Negation

Noun

Singular:
negation
Plural:
negations

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