planet
gb/plˈænət/ us/plˈænət/
A2
English
~ 3000
Senses
0 senses
Noun
A2
entity
1
large body orbiting a star
A big round object in space that moves around a star, like Earth or Mars.
Usage pattern:
[planet] orbits [star]
Common mistake:
Learners sometimes confuse 'planet' with 'star', but a planet does not make its own light.
Synonyms
world (Often used to refer to Earth in a more poetic or broad sense, not strictly astronomical.)
Antonyms
star (A star is a luminous celestial body producing its own light, unlike a planet.)
Collocations
distant planet
|planet Earth
|orbit a planet
|discover a planet
|habitable planet
Themes
science
|astronomy
|space
|core_vocabulary
Examples
- Earth is the third planet from the Sun.
- Astronomers discovered a new planet outside our solar system.
- Mars is known as the red planet because of its color.
- The telescope can capture images of distant planets.
- Venus is sometimes called Earth's twin planet.
Learner examples
- Earth is our planet.
- Mars is a red planet.
- The Sun has eight planets.
- We live on the planet Earth.
Noun
A2
entity
2
Earth as the world
The world we live on, called Earth.
Usage pattern:
the planet [Earth/itself]
Common mistake:
Learners may use 'Earth' without 'the' incorrectly; when using 'planet', 'the' is usually needed in this sense.
Synonyms
Earth (The proper name for our home planet.)
Antonyms
moon (A moon is a natural satellite of a planet, not the planet itself.)
Collocations
save the planet
|protect the planet
|planet's resources
|planet's climate
Themes
environment
|geography
|nature
|space
|core_vocabulary
Examples
- We must work together to save the planet.
- The planet is warming due to human activity.
- Our planet is home to millions of species.
- Climate change affects every part of the planet.
Learner examples
- We must care for our planet.
- Our planet is very beautiful.
- The planet has many animals and plants.
Grammar
Dictionary form
planet
IPA
GB/plˈænət/
US/plˈænət/
Syllables & stress
plan - et (2 syllables)
Stress on 1st syllable (plan)
Word forms
Noun
- Base: planet
- Plural: planets
Word family
Forms
planets
noun
Core family
planetary
adjective B2
Related words
planetarium
noun
exoplanet
noun
Advanced or less common
interplanetary
adjective
Expressions
on another planet
1/ˈɔn ənˈʌðɚ plˈænət/
idiom
informal
unaware of what is happening
Not knowing or noticing what is going on around you.
Examples
- He didn't hear me at all—he was on another planet.
- You must have been on another planet if you missed that news.
planet Earth
1/plˈænət ˈɚθ/
fixed phrase
name for our home world
Another way to say 'Earth', our home in space.
Examples
- Planet Earth has many different climates.
- This documentary shows the beauty of Planet Earth.
save the planet
1/sˈeɪv ðə plˈænət/
fixed phrase
protect Earth from harm
To take action so that Earth is not damaged or destroyed.
Examples
- Many people recycle to save the planet.
- Switching to renewable energy can help save the planet.