Grin may refer to:
- A facial expression, see Smile
- Alexander Grin (1880–1932), Russian novelist
- Grin (Coroner album), 1993
- Grin (band), a band formed by Nils Lofgren
- Grin (Grin album), 1971
GRIN may refer to:
- GRIN (company), a defunct video game developer formerly based in Sweden
- GRIN, an acronym for gradient index; see Gradient-index optics
- GRIN, an acronym for Genetic, Robotic, Information, and Nano technologies
- Germplasm Resources Information Network, a software project
- Grand River Information Network, a Grand River Conservation Authority online mapping and data download tool
Famous quotes containing the word grin:
“There must be something solemn, serious, and tender about any attitude which we denominate religious. If glad, it must not grin or snicker; if sad, it must not scream or curse.”
—William James (1842–1910)