grin

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

• When the ceremony was finished a wide grin broke across his face, and it was that grin she saw, relieved and happy all at once.
• When my son appeared at the door the next day with his schoolbag on his back, the Professor broke into a wide grin and opened his arms to embrace him.

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

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

To express by grinning.transitive

• She grinned pleasure at his embarrassment.

To show the teeth, like a snarling dog.datedintransitive

• The pangs of death do make him grin.

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

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

A snare; a gin.obsolete