grinning

verb

1. (form-of, gerund, participle, present)present participle and gerund of grin

   “I’m grinning because someone told me a joke.”

noun

1. (countable, uncountable)The act or expression of one who grins.

   “The agitations resembled the grinnings and writhings of a galvanized corpse, not the struggles of an athletic man.”