noun.
A denial, contradiction, or negative statement.
noun.
The opposite or absence of something regarded as actual, positive, or affirmative.
The Century Dictionary and Cyclopedia
noun.
The act of denying or of negativing; the opposite of the act of affirming.
noun.
A denial; a declaration that something is not, or has not been, or will not be.
noun.
The absence of that which is positive or affirmative; blankness; emptiness.
the GNU version of the Collaborative International Dictionary of English
noun.
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.
noun.
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.
noun.
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".)
noun.
The logical operation which obtains such (negated) propositions.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a negative statement; a statement that is a refusal or denial of some other statement
noun.
(logic) a proposition that is true if and only if another proposition is false