Definition, Meaning & Synonyms

know-it-all

noun

/ˈnoʊ.ɪt.ɔːl/

Definition

A person who behaves as if they know everything, often to the point of being annoying to others.

Examples

She always tries to answer every question in class, acting like a total know-it-all.
Being a know-it-all can make it hard to make friends.
He thinks he knows how to fix everything; he’s such a know-it-all!

Meaning

The term ‘know-it-all’ refers to an individual who claims to possess extensive knowledge on a wide range of topics, often without actual expertise, and tends to express their opinions with overconfidence.