Definition of "grin" in English

noun

1. A smile in which the lips are parted to reveal the teeth.

verb

1. (intransitive) To smile, parting the lips so as to show the teeth.

   • Why do you grin? Did I say something funny?

2. (transitive) To express by grinning.

   • She grinned pleasure at his embarrassment.

3. (intransitive, dated) To show the teeth, like a snarling dog.

4. (transitive) To grin as part of producing a particular facial expression, such as a smile or sneer.

   • He grinned a broad smile when I told him the result.
   • He grinned a cruel sneer when I begged him to stop.

noun

1. (obsolete) A snare; a gin.