v. & n.
--v. (grinned, grinning)
1. intr. a smile broadly, showing the teeth. b make a forced, unrestrained, or stupid smile.
2 tr. express by grinning (grinned his satisfaction).
--n. the act or action of grinning.
Phrases and idioms:
grin and bear it take pain or misfortune stoically.
Derivatives:
grinner n. grinningly adv.
Etymology: OE grennian f. Gmc