Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


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