What does the word grin mean?

Usage examples for grin

  1. Why, I suppose I'd grin, said Stover slowly, and say: 'How did you guess it? – The Varmint by Owen Johnson F. R. Gruger
  2. He looked me up and down with a grin. – Helmet of Navarre by Bertha Runkle
  3. In the glow of my pitlight I hoped he could see my face and the grin. – Tarrano the Conqueror by Raymond King Cummings