What is the meaning of Grin?

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

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

To express by grinning.

To show the teeth, like a snarling dog.

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

A snare; a gin.

green

laugh

grin

fun

imperative of grine

a grimace

a sneer

a grimace

a sneer

inflection of grina:

1. present
2. imperative

present

imperative

snare

noose

green

green

Source: wiktionary.org