falsehood

noun

1. a false statement; lie.
2. something false; an untrue idea, belief, etc.: The Nazis propagated the falsehood of racial superiority.
3. the act of lying or making false statements.
4. lack of conformity to truth or fact.
5. Obsolete. deception.

noun

1. the quality of being untrue
2. an untrue statement; lie
3. the act of deceiving or lying