Contradiction
describes a sentence that is false by virtue of its meaning alone, irrespective of context.
Contradictions are opposite of analytic sentences. While analytic sentences are always true, contradictions arealways false as a result of words in them. Examples;
Circles are square.A bachelor is married.Kings are female.A blue gas is colorless.In each case, we know the sentence is false because we know the meaning of words in sentences. It is not necessary to refer to the outside world in order to judge their truth values