(now historical or astrology) Each of the seven major bodies which move relative to the fixed stars in the night sky—the Moon, Mercury, Venus, the Sun, Mars, Jupiter and Saturn.

(science fiction, rare) Membership of a particular planet or moon, by origin, birth, naturalization, ownership, allegiance or otherwise.

Someone who helps protect the environment.

plural of extrasolar planet

plural of minor planet

plural of major planet

plural of Jovian planet

plural of exosolar planet

plural of rogue planet

plural of secondary planet