# know-it-all

> English word · Noun · IPA /ˈnəʉ.ɪt.oːl/

## Definitions
1. Someone who claims to be knowledgeable or an expert in something, obnoxiously dismissing the opinions, advice, suggestions, etc. of others.

## Etymology
From know + it + all.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/know-it-all