1. (noun) gray, grayness, grey, greyness
a neutral achromatic color midway between white and black
2. (noun) grey, gray
clothing that is a grey color
"he was dressed in grey"
3. (noun) grey, gray
any organization or party whose uniforms or badges are grey
"the Confederate army was a vast grey"
4. (noun) grey, gray
horse of a light gray or whitish color
5. (noun) gray, Gy
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
6. (noun) Gray, Louis Harold Gray
English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965)
7. (noun) Gray, Thomas Gray
English poet best known for his elegy written in a country churchyard (1716-1771)
8. (noun) Gray, Robert Gray
American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806)
9. (adj) Gray, Asa Gray
United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888)
10. (adj) grey, gray, greyish, grayish
of an achromatic color of any lightness intermediate between the extremes of white and black
"the little grey cells"; "gray flannel suit"; "a man with greyish hair"
11. (adj) grey, gray, grey-haired, gray-haired, grey-headed, gray-headed, grizzly, hoar, hoary, white-haired
showing characteristics of age, especially having grey or white hair
"whose beard with age is hoar"-Coleridge; "nodded his hoary head"
12. (adj) grey, gray
used to signify the Confederate forces in the American Civil War (who wore grey uniforms)
"a stalwart grey figure"
13. (verb) grey, gray
intermediate in character or position
"a grey area between clearly legal and strictly illegal"
14. (verb) grey, gray
make grey
"The painter decided to grey the sky"
15. (verb) grey, gray
turn grey
"Her hair began to grey"
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Definition of 'GRAY' 
