What is the meaning of Gray?

Of a colour between black and white, having neutral hue and intermediate brightness.

Dreary, gloomy, cloudy.

Of indistinct, disputed or uncertain quality or acceptability.

Gray-haired.

Old.

Relating to older people.

To turn gray.

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

To give a soft effect to (a photograph) by covering the negative while printing with a ground-glass plate.

An achromatic colour between black and white.

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

A gray whale, Eschrichtius robustus.

Synonym of grey alien.

A penny with a tail on both sides, used for cheating.

In the International System of Units, the derived unit of absorbed dose of radiation (radiation absorbed by a patient); one joule of energy absorbed per kilogram of the patient's mass.

gray (unit of absorbed radiation)

gray (SI unit)

gray (SI unit)

gray (SI unit of absorbed radiation)

gray (one of a race of evil, short extraterrestrial beings)

gray (SI unit)

Source: wiktionary.org