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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
know-all is a noun meaning "someone who thinks he knows everything and refuses to accept advice or information from others". It carries one recorded sense.
someone who thinks he knows everything and refuses to accept advice or information from others
colloquialism
Definitions, synonyms and semantic relations for know-all come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.