know-it-all

noun
UK: /ˌnəʊ.ɪtˈɔːl/
US: /ˌnoʊ.ɪtˈɔːl/

  1. A person who acts as if they know everything and are always right.

    1. My brother is a know-it-all, always correcting everyone.
    2. The new manager came across as a know-it-all, which made him unpopular with the team.

Synonyms

smart aleck wise guy
know-it-all adjective

  1. Behaving in a way that shows you think you know everything.

    1. He has a know-it-all attitude that annoys people.
    2. Her know-it-all comments made it difficult to have a constructive discussion during the meeting.

Frequently Asked Questions

The phonetic transcription of "know-it-all" is /ˌnəʊ.ɪtˈɔːl/ in British English and /ˌnoʊ.ɪtˈɔːl/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "know-it-all": smart aleck, wise guy.

Example usage of "know-it-all": "My brother is a know-it-all, always correcting everyone.". More examples on the page.