know-it-all know-how • know-little · · · Info · Definitions · Synonyms · Characters · · know-it-all · · Text Common · · Latin · · Scripts 11 · · Length Definitions · · · (noun) someone who thinks he knows everything and refuses to accept advice or information from others. Synonyms: know-all. · · Noun Definition 1 Synonyms · · · know-all · · Synonym 1 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 i latin small letter i U+0069 k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 w latin small letter w U+0077