grain meaning
EN
[ɡɹeɪn] [-eɪn] 
US FR grain 
- NounPLgrainsSUF-ain
- (uncountable) The harvested seeds of various grass food crops eg: wheat, corn, barley.
- We stored a thousand tons of grain for the winter.
- (uncountable) Similar seeds from any food crop, eg buckwheat, amaranth, quinoa.
- A tine, prong, or fork.
- (countable) A single seed of grass food crops.
- a grain of wheat
- grains of oat
- (countable, uncountable) The crops from which grain is harvested.
- The fields were planted with grain.
- (uncountable) A linear texture of a material or surface.
- Cut along the grain of the wood.
- He doesn't like to shave against the grain.
- (countable) A single particle of a substance.
- a grain of sand
- a grain of salt
- (countable) A very small unit of weight, in England equal to 1/480 of an ounce troy, 0.0648 grams or, to be more exact, 64.79891 milligrams (0.002285714 avoirdupois ounce). A carat grain or pearl grain is 1/4 carat or 50 milligrams. The old French grain was 1/9216 livre or 53.11 milligrams, and in the mesures usuelles permitted from 1812 to 1839, with the livre redefined as 500 grams, it was 54.25 milligrams.
- (countable) A former unit of gold purity, also known as carat grain, equal to 1⁄4 "carat" (karat).
- (materials) A region within a material having a single crystal structure or direction.
- A reddish dye made from the coccus insect, or kermes; hence, a red color of any tint or hue, as crimson, scarlet, etc.; sometimes used by the poets as equivalent to Tyrian purple.
- The hair side of a piece of leather, or the marking on that side.
- (in the plural) The remains of grain, etc., after brewing or distillation; hence, any residuum. Also called draff.
- (botany) A rounded prominence on the back of a sepal, as in the common dock.
- Temper; natural disposition; inclination.
- A branch of a tree; a stalk or stem of a plant.
- (founding) A thin piece of metal, used in a mould to steady a core.
- (uncountable) The harvested seeds of various grass food crops eg: wheat, corn, barley.
- VerbSGgrainsPRgrainingPT, PPgrained
- To feed grain to.
- (transitive) To make granular; to form into grains.
- (intransitive) To form grains, or to assume a granular form, as the result of crystallization; to granulate.
- To texture a surface in imitation of the grain of a substance such as wood.
- (tanning) To remove the hair or fat from a skin.
- (tanning) To soften leather.
- To yield fruit.
- To feed grain to.
- More Examples
- Used in the Middle of Sentence
- The rock is strongly tectonized with a finely grained structure.
- This toughness is the result of a uniquely fine grain size imparted by vanadium to steel, anodium steels are readily cast, forged, and rolled.
- Unpolished grains that retained their outer coating were a major lynchpin of his 'whole foods'-based diet.
- Used in the Ending of Sentence
- White rice is rice that has had the brownish hull polished off leaving just the white inner part of the grain.
- Used in the Middle of Sentence
Definition of grain in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Singularia tantum
- Uncountable nouns
- Uncountable nouns
- Countable nouns
- Verbs
- Intransitive verbs
- Transitive verbs
- Intransitive verbs
- Nouns
Source: Wiktionary
Grammatically, this word "grain" is a noun, more specifically, a countable noun and a singularia tantum. It's also a verb, more specifically, an intransitive verb and a transitive verb.