Search Result for "colloquialism": 
Wordnet 3.0

NOUN (1)

1. a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech; 



The Collaborative International Dictionary of English v.0.48:

Colloquialism \Col*lo"qui*al*ism\, n.
   A colloquial expression, not employed in formal discourse or
   writing.
   [1913 Webster]


WordNet (r) 3.0 (2006):

colloquialism
    n 1: a colloquial expression; characteristic of spoken or
         written communication that seeks to imitate informal speech