- 1
The harvested seeds of various grass food crops, especially wheat, maize, rye, barley, and rice.uncountable
- Near-synonym: corn (broad sense, maize and others)
- We stored a thousand tons of grain for the winter.
- 2
Similar seeds from any food crop, e.g., buckwheat, amaranth, quinoa.uncountable
- Near-synonym: corn (broad sense, maize and others)
- 3
A single seed of a food crop, especially a cereal grass crop.countable
- a grain of wheat
- grains of oat
- 4
The crops from which grain is harvested.countableuncountable
- The fields were planted with grain.
- 5
A linear texture of a material or surface.uncountable
- Cut along the grain of the wood.
- He doesn't like to shave against the grain.
- 6
A single particle of a substance.countable
- a grain of sand
- a grain of salt
- 7
Any of various small units of mass originally notionally based on grain's weight, variously standardized at different places and times, including:; The English grain of ¹⁄₅₇₆₀ troy pound or ¹⁄₇₀₀₀ pound avoirdupois, now exactly 64.79891 mg.countableuncountable
- 8
Any of various small units of mass originally notionally based on grain's weight, variously standardized at different places and times, including:; The metric, carat, or pearl grain of ¹⁄₄ carat used for measuring precious stones and pearls, now exactly 50 mg.countableuncountable
- 9
Any of various small units of mass originally notionally based on grain's weight, variously standardized at different places and times, including:; The French grain of ¹⁄₉₂₁₆ livre, equivalent to 53.11 mg at metricization and equal to exactly 54.25 mg from 1812–1839 as part of the mesures usuelles.countablehistoricaluncountable
- 10
Any of various small units of length originally notionally based on a grain's width, variously standardized at different places and times.countablehistorical
syn. grain