What does liar mean?
A liar is a person who deliberately says things that are untrue, especially someone who makes a habit of doing so. The word is more specific than an ordinary critic: it describes dishonesty rather than a simple mistake, poor judgment, or an inaccurate opinion. In serious contexts, calling someone a liar can imply deception on a matter of importance, so it is often an accusatory and potentially damaging label. In informal or playful settings, the same word may be used teasingly, as when children accuse one another of being “liars.” Although liar is most naturally used for people who speak falsely, related forms such as lying and lie come from the same historical source. Together, they form a useful family of words for discussing truthfulness, deception, and the social consequences of making false claims.
nounA person who tells lies or makes false statements, especially habitually. The term is typically used to accuse someone of deliberate dishonesty rather than merely making an error or mistake.
- A person who tells lies, especially someone who does so habitually or deliberately.
"She accused her opponent of being a liar, but no evidence was presented."
"The witness was branded a liar after contradicting his earlier testimony."
"Calling your little brother a liar was the quickest way to start an argument."
The plural is formed by adding -s to the singular form.
"The newspaper described the officials as dishonest liars."
Calling someone a liar is an accusation of deliberate dishonesty, not merely a criticism of an inaccurate statement.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of liar
Liar descends from Old English līare, meaning “one who lies” or “a false speaker.” It is related to Old English līegan, “to lie,” and to the wider Germanic vocabulary of falsehood and deception. The modern form has continued in English with little change, while related forms such as lie, lies, and lying developed within the same word family.
How liar is actually used
Liar is generally a derogatory term and can be seriously offensive, particularly when directed at someone in a public or professional context. It is also used informally and playfully in phrases such as “you liar,” but the intended tone depends heavily on the relationship and situation.
Easily confused with liar
A liar is a person who tells falsehoods, while a lie is the false statement itself.