Definitions of negation

1. ( logic) a proposition that is true if and only if another proposition is false

2. the speech act of negating

3. Act of saying no: denial: ( logic) the absence of certain qualities in anything.

4. Negative statement; denial.

5. Denial; declaration that something is not.

6. Denial, as opposed to affirmation; a declaration that a certain thing is not, or has not been; argument drawn from denial.

7. Description or definition by denial, exclusion, or exception; statement of what a thing is not, or has not, from which may be inferred what it is or has.

8. The act of denying; assertion of the nonreality or untruthfulness of anything; declaration that something is not, or has not been, or will not be; denial; - the opposite of affirmation.