ZebraWords.com - The Definition of 'Know-it-all', Synonyms of 'Know-it-all' & More on 'Know-it-all'

1. WordNet® 3.0 (2006)

know-it-all
    n 1: someone who thinks he knows everything and refuses to
         accept advice or information from others [syn: know-it-
         all, know-all]

2. The Collaborative International Dictionary of English v.0.48

Know-it-all \Know"-it-all`\, n.
   One who knows everything; hence, a person who makes
   pretension to great knowledge, especially one whose didactic
   conversational habit conspicuously reveals his belief that he
   has superior knowledge on many subjects; a wiseacre; a
   know-all; -- usually ironical. [Colloq. & pejorative]

   Note: the use of this term implies that the speaker
         disapproves of this behavior, and may think that it is
         unjustified
         [1913 Webster +PJC]

Thesaurus Results for Know-it-all:

1. Moby Thesaurus II by Grady Ward, 1.0

Narcissus, aggressively self-confident, biggety, braggart, bumptious, chesty, cocky, conceited, egocentric, egoist, egotist, immodest, individualist, narcissist, narcist, no modest violet, obtrusive, overwise, peacockish, peacocky, perk, perky, pert, puffed up, self-conceited, self-opinionated, smart aleck, smart-alecky, smarty, smarty-pants, stuck-up, swelled-headed, swellhead, wise guy, wiseacre, wisecracker, wisehead, wisenheimer

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