Definition of planet in English:

planet

noun

  • 1A celestial body moving in an elliptical orbit round a star.

    • ‘Kepler showed that a planet moves round the Sun in an elliptical orbit which has the Sun in one of its two foci.’
    • ‘Nasa astronomers said they had found the smallest planets yet orbiting stars beyond our Sun.’
    • ‘The planets all orbit the Sun in the same direction, with orbital planes inclined slightly to the ecliptic.’
    • ‘Measuring the changing brightness of a star can tell us whether there are planets orbiting around it.’
    • ‘The latest find is a system of three planets orbiting around a star previously thought to have only one.’
    • ‘Both depend on the gravitational attraction exerted on the parent star by orbiting planets.’
    • ‘Astronomers in the US reckon they've identified a tenth planet orbiting our sun.’
    • ‘If the candidate planet does orbit the brown dwarf, then the pair will move across the sky together.’
    • ‘The mass of the orbiting planet causes the central star to be pulled around in an orbit.’
    • ‘Gazing at the stars, planets and distant galaxies is a universal pleasure, but it's one denied to most of us.’
    • ‘Her school projects and papers were all about the stars, planets, and outer space.’
    • ‘There are brilliant people out there who search the very heavens and map the orbit of the stars and planets.’
    • ‘The problem is, you have to do these measurements for at least one full orbit of any planets that might be there.’
    • ‘Any planet with a stable orbit in that zone might be able to support life long enough for intelligence to evolve.’
    • ‘That the star Sirius has five planets is not something which anyone could conclusively verify at present.’
    • ‘It has ignited a drive to find more planets and smaller planets around more stars.’
    • ‘This professor is in charge of discovery of new planets and celestial bodies.’
    • ‘The kite is designed to take pictures of planets and asteroids around the solar system.’
    • ‘He had a model which showed the movements of the sun and the moon and certain stars and planets.’
    • ‘You can divide little objects out, not only the planets, but the nebula and clusters of stars.’
    planet, satellite, moon, star, heavenly body, orb
    1. 1.1the planetThe earth.
      ‘no generation has the right to pollute the planet’
      • ‘The high tax on petrol was put on in the first place to encourage people to use less of something which is polluting the planet.’
      • ‘Ten years ago at the Rio earth summit the world accepted the need to manage the planet as a single whole for the whole of the human race.’
      • ‘The idea behind the relay is to unite the world and infuse the planet with the Olympic spirit.’
      • ‘Back on the radio earth summit website, the sounds people from across the planet want to send to the summit keep coming.’
      • ‘Not only do I think he was one of the greatest musicians to appear on planet earth, I think he was a really nice bloke.’
      • ‘His flight lasted a mere one hundred and eight minutes, but he returned to Earth the most famous man on the planet.’
      • ‘In this sense, he argues, the planet itself is alive, and so sustains life on Earth.’
      • ‘Yet for all his vision, he has not fought hard enough against the polluters who threaten the planet.’
      • ‘Canada is one of the worst polluters on the planet and it is time to do something about it.’
      • ‘It lay in the drive to further hand the fate of the planet and the world's poor over to big business.’
      • ‘We, after all live on an increasingly polluted planet of finite recourses and space.’
      • ‘After all, there isn't a man, woman or child on the planet who would not like to see an end to world poverty.’
      • ‘Purpose is the unique gifts and insights that you bring to the planet and can contribute to your world.’
      • ‘New York is arguably the only city in the world whose self-regard is reciprocated across the planet.’
      • ‘They provide a world view of people working to protect the planet we live on.’
      • ‘Creating a thing that will prevent the planet spinning off its axis makes the world a safer place.’
      • ‘This means weighting the rules of world trade to benefit poor people and the planet.’
      • ‘It seems that humanity has abused Earth to the point where the planet is no longer inhabitable.’
      • ‘His songs changed the world and there is not a songwriter on the planet who has not been influenced by him.’
      • ‘There is no need to worry about this asteroid due to destroy planet Earth in 2019.’
      earth, globe, planet, sphere
    2. 1.2Astrology historical A celestial body distinguished from the fixed stars by having an apparent motion of its own (including the moon and sun), especially with reference to its supposed influence on people and events.
      ‘the planets are presently influencing you in a positive way’
      • ‘It is difficult for the individual to see the extent to which the drive of the aspecting planet is influencing their life.’
      • ‘With the Sun as the ruler of the 2nd house, this trio of planets also influenced his economic affairs.’
      • ‘The effect is to harmoniously combine the influences of the planets.’
      • ‘What physical mechanism is there for the planets to influence me down here on earth?’
      • ‘Both planets were direct in motion; Mars was moving slowly and Venus was moving swiftly.’

The planets of the solar system are either gas giants—Jupiter, Saturn, Uranus, and Neptune—or smaller rocky bodies—Mercury, Venus, Earth, and Mars. Pluto, formerly regarded as the ninth planet, was in 2006 reclassified as a dwarf planet. The minor planets, or asteroids, orbit mainly between the orbits of Mars and Jupiter. Only Earth and Venus have substantial atmospheres

Phrases

    what planet are you on?
    British informal
    • Used to indicate that someone is out of touch with reality.

      ‘What planet are you on mate if you think this only happens in the Australian Football League?’
      ‘And as for stealing the election from her, what planet are you on?’

Origin

Middle English from Old French planete, from late Latin planeta, planetes, from Greek planētēs ‘wanderer, planet’, from planan ‘wander’.

Pronunciation

planet

/ˈplanɪt/