Contrary to known or agreed facts; untrue.
Of or in comparison to a hypothetical state of the world.
A conditional statement in which the conditional clause is false.
A claim, hypothesis, or other belief that is contrary to the facts.
A hypothetical state of the world, used to assess the impact of an action.
Having an indistinct, disputed or uncertain quality.
Gray-haired.
Old.
Having a color somewhere between white and black, as the ash of an ember.
Relating to older people.
Dreary, gloomy.
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)
To become gray.
To give a soft effect to (a photograph) by covering the negative while printing with a ground-glass plate.
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.
An achromatic colour intermediate between black and white.
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. Symbol: Gy