grinned; grinning
Definition of grin
(Entry 1 of 2)
: to draw back the lips so as to show the teeth especially in amusement or laughter
broadly
: smile
grinning from ear to ear
grin
noun
plural grins
Definition of grin (Entry 2 of 2)
: a facial expression produced by grinning especially in pleasure or amusement
a happy grin She grew into a nimble young girl of seven winters, a thoughtful girl with shining brown eyes and a wide grin …— Louise Erdrich I wanted to wipe the grin off his face [=make him stop smiling.]
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Merriam-Webster unabridged
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Time Traveler for grin
The first known use of grin was before the 12th century
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