Grin, n. The act of closing the teeth and showing them, or of withdrawing the lips and showing the teeth; a hard, forced, or sneering smile. I. Watts.
He showed twenty teeth at a grin. Addison.
Webster's Dictionary 1913
Grin, n. The act of closing the teeth and showing them, or of withdrawing the lips and showing the teeth; a hard, forced, or sneering smile. I. Watts.
He showed twenty teeth at a grin. Addison.