An achromatic colour intermediate between black and white.

An animal or thing of grey colour, such as a horse, badger, or salmon.

An extraterrestrial humanoid with grayish skin, bulbous black eyes, and an enlarged head.

To become gray.

“My hair is beginning to gray.”

To cause to become gray.

To turn progressively older, alluding to graying of hair through aging (used in context of the population of a geographic region)

“the graying of America”

Having a color somewhere between white and black, as the ash of an ember.

Dreary, gloomy.

Having an indistinct, disputed or uncertain quality.