| noun | a neutral achromatic color midway between white and black |
| noun | clothing that is a grey color “he was dressed in grey” |
| noun | any organization or party whose uniforms or badges are grey “the Confederate army was a vast grey” |
| noun | horse of a light gray or whitish color |
| noun | the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad |
| noun | English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965) |
| noun | English poet best known for his elegy written in a country churchyard (1716-1771) |
| noun | American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806) |
| noun | United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888) |
| verb | make grey “The painter decided to grey the sky” |
| verb | turn grey “Her hair began to grey” |
| adjective | of an achromatic color of any lightness intermediate between the extremes of white and black “the little grey cells” |
| adjective | showing characteristics of age, especially having grey or white hair; -Coleridge “whose beard with age is hoar” |
| adjective | used to signify the Confederate forces in the American Civil War (who wore grey uniforms) “a stalwart grey figure” |
| adjective | intermediate in character or position “a grey area between clearly legal and strictly illegal” |
| gray | adjective | of an achromatic color of any lightness intermediate between the extremes of white and black |
| gray | verb | make grey |
| grey | verb | turn grey |
| grey | adjective | of an achromatic color of any lightness intermediate between the extremes of white and black |
| grey | noun | a neutral achromatic color midway between white and black |
| gray | noun | a neutral achromatic color midway between white and black |
| greyness | noun | a neutral achromatic color midway between white and black |
| grayness | noun | a neutral achromatic color midway between white and black |
| grizzle | noun | a grey wig |
| hoariness | noun | a silvery-white color |