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1Of a color intermediate between black and white, as of ashes or an overcast sky.‘gray flannel trousers’greyish, silverywhite, silver, hoaryashen, wan, pale, pasty, pallid, colourless, sallow, leaden, bloodless, anaemic, white, waxen, chalkyView synonyms
- 1.1 (of the weather) cloudy and dull; without sun.‘a cold, gray November day’cloudy, overcast, dull, dim, dark, sunlessView synonyms
- 1.2 (of a person) having gray hair.‘a gray, fatherly gentleman’
- 1.3informal Relating to old people, especially when seen as an oppressed group.‘the political power of the gray vote’
- 1.4 (of a person's face) pale, as through tiredness, age, or illness.‘a few people, their faces gray and bitter’pale, deathly pale, pallid, white, bloodless, ashen, ashen-faced, ashy, chalky, chalk-white, grey, white-faced, whey-faced, waxen, waxy, corpse-like, deathlike, ghostlyView synonyms
- 1.1 (of the weather) cloudy and dull; without sun.
2Dull and nondescript; without interest or character.‘gray, faceless men’‘the gray daily routine’characterless, colourless, nondescript, unremarkable, facelessView synonyms
3(of financial or trading activity) not accounted for in official statistics.‘the gray economy’unofficial, informal, irregular, back-doorView synonyms
1Gray color or pigment.‘dirty intermediate tones of gray’
- 1.1 Gray clothes or material.‘the gentleman in gray’
- 1.2 Gray hair.‘he sighed at the amount of gray at his temple’
- 1.3usually Gray The Confederate army in the Civil War, or a member of that army.
- 1.1 Gray clothes or material.
2A gray thing or animal, in particular a gray or white horse.
1(especially of hair) become gray with age.‘he had put on weight and grayed somewhat’‘a man of about fifty with graying hair’
- 1.1 (of a person or group) become older; age.‘a graying workforce’age, get old, grow old, matureView synonyms
- 1.1 (of a person or group) become older; age.
gray something out
Display a menu option in a light font to indicate that it is not available.‘all the property fields on the Shortcut tab are either missing or grayed out’
Old English grǣg, of Germanic origin; related to Dutch grauw and German grau.
The SI unit of the absorbed dose of ionizing radiation, corresponding to one joule per kilogram.
- ‘The sievert is numerically equivalent to the gray for electrons and for X-rays irradiating the whole body.’
- ‘Radiation doses are measured in rads or grays, where 1 gray equals 100 rads.’
- ‘When a doctor prescribes a treatment he will define it in terms of dose in Grays required at a point.’
- ‘Thus for these particular radiations the dose equivalent in sieverts is numerically equal to the absorbed dose in grays.’
- ‘To calculate the dose equivalent one of the workers would receive in sieverts, you would need to multiply the dose in grays, by the quality factor.’
1970s: named after Louis H. Gray (1905–65), English radiobiologist.
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