What does falsity mean?
Falsity is the quality of being false or untrue. As a noun, it can refer either to the abstract property that a false statement, belief, or representation possesses, or to a specific instance of untruth — a claim that turns out to be wrong or deceptive. The word belongs chiefly to formal registers: philosophers weigh the falsity of propositions, lawyers establish the falsity of documents or testimony, and critics expose the falsity behind public claims. Its connotation depends on context — a falsity may be an innocent mistake, but when paired with intention it shades into deceit and falsehood. Related words such as falsehood, mendacity, and inaccuracy each carry slightly different emphasis, making falsity valuable precisely where precision matters: naming not merely a lie, but the state or quality of being untrue itself.
nounThe quality or state of being false; something that is untrue or incorrect, such as a statement, belief, or representation.
- The quality or condition of being false or untrue.
- A particular instance of something untrue, such as a false statement or belief.
"The report was riddled with falsity, and no one who read it closely believed a word of it."
"Philosophers have long debated how to determine the falsity of a belief."
"The witness's account was later shown to be a complete falsity."
The plural refers to multiple instances of untruth, e.g. the many falsities in an account.
"The article catalogued the numerous falsities spread during the campaign."
In law, proving the 'falsity' of a signature has freed forgery suspects — one small word carrying the full weight of what is not true.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of falsity
Falsity derives from Latin 'falsus', meaning false, formed on the verb 'fallere', to deceive. It came into English via Old French 'fausseté' and has been in use since late Middle English, with well-established usage by the early modern period. The same Latin root underlies a family of English words including 'false', 'falsify', and 'falsifiable'.
How falsity is actually used
Falsity is a relatively formal word, common in philosophy, logic, law, and academic writing rather than everyday conversation. In casual speech, speakers tend to use 'lie', 'untruth', or simply 'false'. It carries a neutral to negative connotation depending on whether the falsity is an honest error or a deliberate deception.
Easily confused with falsity
Falsehood usually refers to a specific false statement, while falsity more often denotes the abstract quality of being false.