1. A neutral achromatic color midway between white and black (synset 104968868)
  2. Clothing that is a grey color (synset 103461130)
    "he was dressed in grey"
  3. Any organization or party whose uniforms or badges are grey (synset 108498020)
    "the Confederate army was a vast grey"
  4. Horse of a light gray or whitish color (synset 102384016)
  5. 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 (synset 113667291)
  6. English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965) (synset 111032989)
  7. English poet best known for his elegy written in a country churchyard (1716-1771) (synset 111032842)
  8. American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806) (synset 111032672)
  9. United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888) (synset 111032470)
  1. Of an achromatic color of any lightness intermediate between the extremes of white and black (synset 300390371)
    "the little grey cells"; "gray flannel suit"; "a man with greyish hair"
  2. Showing characteristics of age, especially having grey or white hair (synset 301650120)
    "whose beard with age is hoar"; "nodded his hoary head"
  3. Used to signify the Confederate forces in the American Civil War (who wore grey uniforms) (synset 301611702)
    "a stalwart grey figure"
  4. Intermediate in character or position (synset 301018282)
    "a grey area between clearly legal and strictly illegal"
  1. Make grey (synset 200290441)
    "The painter decided to grey the sky"
  2. Turn grey (synset 200290154)
    "Her hair began to grey"

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