planetnoun [ C ]
uk/ˈplæn.ɪt/us/ˈplæn.ɪt/B1 an extremely large, round mass of rock and metal, such as Earth, or of gas, such as Jupiter, that moves in a circular path around the sun or another star:
the planet Earth/Venus
Might there be intelligent life on other planets?
More examples
- The planet Jupiter radiates twice as much heat from inside as it receives from the Sun.
- an unmanned mission to the planet Mars
- They launched a rocket to the planet Venus.
- Environmentalists have no political axe to grind - they just want to save the planet.
- Is it too late to repair the damage we have done to our planet?
Thesaurus: synonyms and related words
Astronomy
- asteroid
- astral
- astro-
- astrolabe
- astronomer
- geostationary orbit
- gibbous
- heavenly body
- interplanetary
- interstellar
- Pleiades
- plough
- Pluto
- Polaris
- pulsar
- Uranus
- Venus
- vernal equinox
- wane
- white dwarf
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Idiom(s)
be on another planet