Grin

Grin, grins, or GRIN may refer to:


 * A facial expression, see smile
 * Grin (Coroner album), 1993
 * Grin (band), a band formed by Nils Lofgren
 * Grin (Grin album), 1971
 * "Grins" (song), a 2013 song by Charli XCX off the album True Romance (Charli XCX album)
 * Grin (surname)
 * Grins, Austria
 * Germplasm Resources Information Network, a software project
 * Grin (company), a defunct Swedish video game developer
 * GRIN Campaign, an organisation which campaigns for equality in education
 * GRIN, an acronym for gradient index; see Gradient-index optics