What does grin mean?
(Entry 1 of 2) intransitive verb. : to draw back the lips so as to show the teeth especially in amusement or laughter broadly : smile grinning from ear to ear. grin.
How do I spell grin?
verb (used without object), grinned, grin·ning.
to smile broadly, especially as an indication of pleasure, amusement, or the like. to draw back the lips so as to show the teeth, as a snarling dog or a person in pain.