vi.

1. 露齒而笑[（+at/with）]
   She grinned foolishly at him.

   她咧著嘴對他傻笑。

2. （因痛苦，憤恨等）齜牙咧嘴

vt.

1. 露齒笑著表示
   She grinned her appreciation of my help.

   她露齒一笑表示感激我的幫助。

n.

1. 露齒的笑；齜牙咧嘴[C]
   He had a broad grin on his face.

   他滿臉笑容。

v.

1. smile broadly.
2. grimace grotesquely in a way that reveals the teeth.

n.