noun, masculine
- grain (the seed of various grass food crops)
- grain, seed, kernel, bean (a single seed of certain crops)
- grain (a single similar particle of various substances)
- pimple, blackhead (a blocked skin pore, typically inflamed, painful, and filled with pus)
- figuratively point (the main intent or focus of a conversation)
- grain (the linear texture of a material or surface, especially wood)
- grain (flawed visual texture present in most processed photographic film)
- historical grano, Spanish grain (a traditional small unit of mass, equivalent to about 50 mg)
- historical grain (any of various traditional units of mass notionally based on the weight of different grains)