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Noun: grinning  gri-ning
  1. A facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement
    - smile, smiling, grin
Verb: grin (grinned,grinning)  grin
  1. To draw back the lips and reveal the teeth, in a smile, grimace, or snarl

Type of: facial expression, facial gesture, smile

Encyclopedia: Grinning

Grin