›(of) the color that is a mixture of black and white, the color of clouds when it rains: a gray coat[U]She was dressed in gray.›Hair that has changed color to gray: He’s already beginning to turn gray.›If the weather is gray, there are a lot of clouds in the sky.›A gray area is an unclear situation, usually because the rules that relate to it are not known: Criminal negligence is a gray area.