Grin

v. i. [imp. & p. p. GRINNED; p. pr. & vb. n. GRINNING.] [A-S. grinnian, grennian, Dan. grine, Sw. & Icel. grina, O. H. Ger. grinnan, grennan, grīnan, M. H. Ger. grinnen, grīnen, N. H. Ger. greinen, D. grijnen; whence Pr. grinar, Prov. Fr. grigner (les dents), It. digrignare.] To set the teeth together and open the lips, or to open the mouth and withdraw the lips from the teeth, so as to show them, as in laughter, scorn, or pain. The pangs of death do make him grin. Shak.

n. [A-S. grin, gryn, girn, gyrn.] The act of closing the teeth and showing them, or of withdrawing the lips and showing the teeth. Watts.

He showed twenty teeth at a grin. Addison.

v. t. To express by grinning. “Grinned horribly a ghastly smile.” Milton.