gray (Adjective) — Of an achromatic colour of any lightness intermediate between the extremes of white and black. ex. "gray flannel suit"
gray (Adjective) — Showing characteristics of age, especially having grey or white hair. ex. "whose beard with age is gray"
gray (Adjective) — Used to signify the Confederate forces in the American Civil War (who wore grey uniforms). ex. "a stalwart gray figure"
gray (Adjective) — Intermediate in character or position. ex. "a gray area between clearly legal and strictly illegal"
gray (Noun) — A neutral achromatic colour midway between white and black.
gray (Noun) — Clothing that is a grey colour. ex. "he was dressed in gray"
gray (Noun) — Any organization or party whose uniforms or badges are grey. ex. "the Confederate army was a vast gray"
gray (Noun) — Horse of a light grey or whitish colour.
gray (Noun) — 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 grey equals 100 rad.
gray (Noun) — English poet best known for his elegy written in a country churchyard (1716-1771).
gray (Noun) — American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806).
gray (Noun) — United States botanist who specialized in North American flora and who was an early supporter of Darwin's theories of evolution (1810-1888).
gray (Noun) — English radiobiologist in whose honour the grey (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965).
gray (Verb) — Make grey. ex. "The painter decided to gray the sky"
gray (Verb) — Turn grey. ex. "Her hair began to gray"