| grey | (adjective) of an achromatic color of any lightness intermediate between the extremes of white and black | Synonyms: gray, grayish, greyish |
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| (adjective) intermediate in character or position | Synonyms: gray |
| (adjective) showing characteristics of age, especially having grey or white hair | Synonyms: gray-haired, gray-headed, gray, grey-haired, grey-headed, grizzly, hoar, hoary, white-haired |
| (adjective) used to signify the Confederate forces in the American Civil War (who wore grey uniforms) | Synonyms: gray |
| (noun) horse of a light gray or whitish color | Synonyms: gray |
| (noun) clothing that is a grey color | Synonyms: gray |
| (noun) a neutral achromatic color midway between white and black | Synonyms: gray, grayness, greyness |
| (noun) any organization or party whose uniforms or badges are grey | Synonyms: gray |
| (verb) turn grey | Synonyms: gray |
| (verb) make grey | Synonyms: gray |