1. (noun)grain a relatively small granular particle of a substance "a grain of sand"; "a grain of sugar"
2. (noun)grain, food grain, cereal foodstuff prepared from the starchy grains of cereal grasses
3. (noun)grain the side of leather from which the hair has been removed
4. (noun)grain, metric grain a weightunit used for pearls or diamonds: 50 mg or 1/4 carat
5. (noun)grain 1/60 dram; equals an avoirdupoisgrain or 64.799 milligrams
6. (noun)grain 1/7000 pound; equals a troygrain or 64.799 milligrams
7. (noun)grain, caryopsis dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indiancorn
8. (noun)grain a cerealgrass "wheat is a grain that is grown in Kansas"
9. (noun)grain the smallest possibleunit of anything "there was a grain of truth in what he said"; "he does not have a grain of sense"
10. (noun)grain the direction, texture, or pattern of fibers found in wood or leather or stone or in a woven fabric "saw the board across the grain"
11. (verb)texture, grain the physical composition of something (especially with respect to the size and shape of the small constituents of a substance) "breadfruit has the same texture as bread"; "sand of a fine grain"; "fish with a delicate flavor and texture"; "a stone of coarse grain"
12. (verb)ingrain, grain thoroughly work in "His hands were grained with dirt"
Definition of 'grain' 
