Definition of smiley noun from the Oxford Advanced American Dictionary

     

    smiley

     noun
    noun
    NAmE//ˈsmaɪli//
     
     
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  1. 1a simple picture of a smiling face that is drawn as a circle with two eyes and a curved mouth
  2. 2 a simple picture or series of keyboard symbols :-) that represents a smiling face. The symbols are used, for example, in e-mail or text messages to show that the person sending the message is pleased or is joking.
See the Oxford Advanced Learner's Dictionary entry: smiley