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Definition of Know-it-all

Babylon English

person who thinks he knows everything, person who thinks he is right all the time
(Informal) know-it-all, person who thinks he knows everything, person who thinks he is right all the time, smart aleck
Know-it-all Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

know-it-all
n : (informal) someone who thinks he knows everything and refuses to accept advice or information from others [syn: know-all]



ENGLISH IDIOMS 2.EDITION
a person who acts as if they know everything He is a know-it-all and nobody likes to be around him.
WordNet 2.0

Noun
1. someone who thinks he knows everything and refuses to accept advice or information from others
(synonym) know-all
(hypernym) egotist, egoist, swellhead
(classification) colloquialism
Know-it-all Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
A know-it-all or know-all is a person who obnoxiously purports an expansive comprehension of a topic and/or situation when in reality, his/her comprehension is inaccurate or limited. This display may or may not be directly expressed.

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