definition of
grain

[1] #1 grain n. a relatively small granular particle of a substance; "a grain of sand"; "a grain of sugar". wn

[2] #2 grain n. [food grain, cereal] foodstuff prepared from the starchy grains of cereal grasses. wn

[3] #3 grain v. [ingrain] thoroughly work in; "His hands were grained with dirt". wn

[4] #4 grain v. paint (a surface) to make it look like stone or wood. wn

[5] #5 grain v. [granulate] form into grains. wn