n.
Pronunciation: ' grin
Function: intransitive verb
Inflected Form: grinned ; grin · ning
Etymology: Middle English grennen, from Old English grennian; akin to Old High German grennen to snarl
Date: before 12th century
: to draw back the lips so as to show the teeth especially in amusement or laughter broadly : SMILE
– grin noun
– grin · ner noun
– grin · ning · ly \ ' gri-ni ŋ -l ē \ adverb