Pronunciation: (grā),[key] —adj.,-er, -est, —n., v.
—adj. 1. of a color between white and black; having a neutral hue.
2. dark, dismal, or gloomy: gray skies. 3. dull, dreary, or monotonous.
4. having gray hair; gray-headed.
5. pertaining to old age; mature.
6. Informal.pertaining to, involving, or composed of older persons: gray households. 7. old or ancient.
8. indeterminate and intermediate in character: The tax audit concentrated on deductions in the gray area between purely personal and purely business expenses.
—n. 1. any achromatic color; any color with zero chroma, intermediate between white and black.
2. something of this color.
3. gray material or clothing: to dress in gray. 4. an unbleached and undyed condition.
5. (often cap.) a member of the Confederate army in the American Civil War or the army itself. Cf. blue (def. 5).
6. a horse of a gray color.
7. a horse that appears white but is not an albino.
—v.t., v.i. to make or become gray. Also,grey.
Pronunciation: (grā),[key] —n.Physics. the SI unit of absorbed dose, equal to the amount of ionizing radiation absorbed when the energy imparted to matter is 1 J/kg. Abbr.: Gy Cf. rad.
Pronunciation: (grā),[key] —n. 1. A•sa Pronunciation: (ā'su),[key] 1810–88, U.S. botanist.
2. Thomas, 1716–71, English poet.