noun, plural fal·si·ties.
- the quality or condition of being false; incorrectness; untruthfulness; treachery.
- something false; falsehood.
noun plural -ties
- the state of being false or untrue
- something false; a lie or deception
1550s, from Old French fauseté (12c., Modern French fausseté), from Late Latin falsitatem (nominative falsitas), from Latin falsus (see false).