DICT.TW Dictionary Taiwan

 Grin, v. i. [imp. & p. p. Grinned p. pr. &  vb. n. Grinning.]
 1. To show the teeth, as a dog; to snarl.
 2. To set the teeth together and open the lips, or to open the mouth and withdraw the lips from the teeth, so as to show them, as in laughter, scorn, or pain.
    The pangs of death do make him grin.   --Shak.

 grinned
      See grin

 grin
      n : a facial expression characterized by turning up the corners
          of the mouth; usually shows pleasure or amusement [syn: smile,
           smiling, grinning]
      v : to draw back the lips and reveal the teeth, in a smile,
          grimace, or snarl
      [also: grinning, grinned]