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Noun: know-all  'now,ol
Usage: informal
  1. Someone who thinks he knows everything and refuses to accept advice or information from others
    - know-it-all [informal]

Derived forms: know-alls

Type of: egoist, egotist, swellhead [N. Amer, informal]

Encyclopedia: Know-all

Nearest

know apart
know as
know backwards
know by heart
know nothing
know the ropes
know the score
know what's going on
know what's what
knowable
know-all
knower
knoweth
know-how
knowing
knowingly
knowingness
know-it-all
knowledgable
knowledge
knowledge base