Grin
WordNet

noun


(1)   A facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement

verb


(2)   To draw back the lips and reveal the teeth, in a smile, grimace, or snarl
WiktionaryText

Noun


  1. A smile in which the lips are parted to reveal the teeth.

Verb



  1. To smile parting the lips so as to show the teeth.
 
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