terrestrial
gb/tɚˈɛstɹiəl/ us/tɚˈɛstɹiəl/
B2
English
~ 9700
Senses
0 senses
adjective
B2
property
1
relating to the planet Earth
About the Earth, not space or other planets.
Usage pattern:
terrestrial [noun]
Common mistake:
Learners sometimes confuse "terrestrial" with "extraterrestrial" and use "terrestrial" to mean "alien". Remember: "terrestrial" = about Earth, "extraterrestrial" = beyond Earth. Some also confuse it with "terrain" and say *"the terrestrial of the city"* instead of "the terrain" or "the land".
Synonyms
earthly (Often slightly more general or literary; can also mean 'not spiritual', while 'terrestrial' is more scientific in this sense.)
Antonyms
extraterrestrial (Refers to things originating outside the Earth or its atmosphere, the opposite of Earth-related.)
Collocations
terrestrial environment
|terrestrial life
|terrestrial ecosystem
|terrestrial habitats
|terrestrial biodiversity
|terrestrial climate
Themes
science
|space
|environment
Examples
- Scientists are studying how terrestrial life might survive long-term space travel.
- The probe sent back detailed images of the planet's terrestrial surface.
- These findings could change our understanding of terrestrial climate systems.
- The film compares terrestrial ecosystems with hypothetical alien worlds.
- Most known terrestrial species are still found in tropical regions.
Learner examples
- Astronauts look at terrestrial weather from space.
- The book is about terrestrial life and the oceans.
- We need to protect our terrestrial environment.
- This map shows all major terrestrial regions on Earth.
- The satellite takes photos of terrestrial storms.
adjective
technical
B2
property
2
living or occurring on land
Living, growing, or happening on land, not in water or the air.
Usage pattern:
terrestrial [animal/plant/species/ecosystem]
Common mistake:
Learners sometimes use "land" as an adjective and say *"land animals"* in formal writing where "terrestrial animals" is more precise. They may also confuse "terrestrial" with "territorial"; "territorial" means protective of an area, not living on land.
Synonyms
land-dwelling (More informal and descriptive; often used in everyday speech, whereas "terrestrial" is more scientific or technical.)
Antonyms
aquatic (Describes organisms or things that live in or are related to water, the opposite of living on land.)
Collocations
terrestrial animals
|terrestrial plants
|terrestrial mammals
|terrestrial ecosystems
|terrestrial habitats
|aquatic and terrestrial species
Themes
science
|nature
|environment
|animals
Examples
- Frogs have both aquatic and terrestrial stages in their life cycle.
- The island hosts a surprising number of terrestrial mammals.
- Many terrestrial plants cannot tolerate saltwater conditions.
- Terrestrial ecosystems are strongly affected by changes in rainfall.
- Soil quality is crucial for terrestrial biodiversity.
Learner examples
- Giraffes are terrestrial animals.
- Cows, lions, and dogs are all terrestrial mammals.
- This forest is a rich terrestrial ecosystem.
- Deserts are dry terrestrial habitats.
- Unlike fish, snakes are terrestrial animals.
adjective
formal
C1
property
3
worldly, of this physical life
About life in this world, not about religion, the soul, or heaven.
Usage pattern:
terrestrial [life/concerns/existence/pleasures]
Common mistake:
Learners sometimes use "terrestrial" here in casual speech where it sounds too formal; in everyday English, "worldly" or simply "everyday" is more common. Also, do not confuse this sense with the scientific sense; in science, "terrestrial" usually does not mean "non-spiritual".
Synonyms
worldly (Very common in this sense; often suggests being focused on practical or material things rather than spiritual values.)
Antonyms
spiritual (Relates to the soul, religion, or inner life, in contrast to physical, earthly existence.)
Collocations
terrestrial life
|terrestrial concerns
|terrestrial existence
|terrestrial pleasures
|terrestrial affairs
|terrestrial reality
Themes
religion
|philosophy
|society
|daily_life
Examples
- The novel contrasts celestial ideals with everyday terrestrial concerns.
- Many religions teach that terrestrial life is only a temporary stage.
- He seemed uninterested in terrestrial pleasures, focusing instead on meditation.
- The poem reflects on our brief terrestrial existence.
- Her thoughts moved beyond terrestrial worries to questions about eternity.
Learner examples
- Some people care more about spiritual things than terrestrial life.
- The story is not about heaven but about normal terrestrial problems.
- He tries to forget his terrestrial worries when he prays.
- The film shows how short our terrestrial existence can be.
- She wants to enjoy her terrestrial life while she can.
adjective
technical
C1
property
4
using land-based TV transmitters
About TV that is sent from towers on land, not from satellites or by cable.
Usage pattern:
terrestrial [television/channel/broadcast/service]
Common mistake:
Learners sometimes think "terrestrial television" means "TV about the Earth". It actually describes how the signal is sent (from land-based towers), not the content of the programs.
Synonyms
over-the-air (Common in everyday technical and consumer language; stresses that the TV signal is received by antenna, not cable or satellite.)
Antonyms
satellite (Describes television services and channels delivered via satellites, contrasting with land-based transmission.)
Collocations
terrestrial television
|digital terrestrial television
|terrestrial broadcast
|terrestrial channels
|terrestrial networks
|terrestrial signal
Themes
technology
|media
|communication
Examples
- Many rural areas still rely on terrestrial television for basic channels.
- The regulator announced new rules for digital terrestrial broadcasting.
- Viewers reported interruptions to the terrestrial signal during the storm.
- Some stations are available on both terrestrial and satellite platforms.
- The country completed its switch to digital terrestrial TV in 2015.
Learner examples
- We can watch free terrestrial television with an antenna.
- This channel is on terrestrial TV and on cable.
- The government is improving digital terrestrial services.
- They lost the terrestrial signal during the heavy rain.
- Many people still use terrestrial broadcasts to watch the news.
Noun
technical
C2
entity
5
land-dwelling organism
An animal or plant that lives on land, not in water or in the air.
Usage pattern:
a terrestrial; terrestrials and [aquatics/birds etc.]
Common mistake:
This noun use is rare outside scientific writing. Learners sometimes try to use it in everyday speech (e.g., *"I like terrestrials more than fish"*), which sounds unnatural; say "land animals" instead.
Synonyms
land animal (More informal and specific to animals; "terrestrial" as a noun can include plants in technical usage.)
Antonyms
aquatic (Used as a noun in scientific contexts to refer to organisms that live in water, the opposite habitat.)
Collocations
a terrestrial
|terrestrials and aquatics
|small terrestrials
|native terrestrials
|marine and terrestrials
Themes
science
|nature
|environment
|animals
Examples
- The reserve protects both terrestrials and aquatic species.
- Many of the island's terrestrials are found nowhere else on Earth.
- Smaller terrestrials often adapt more quickly to habitat changes.
- The study compares marine invertebrates with related terrestrials.
- Most terrestrials in this region are threatened by deforestation.
Learner examples
- The scientist studies fish and other aquatics, not terrestrials.
- Many terrestrials on the island are very small animals.
- These terrestrials cannot live in water.
- The park is home to many different terrestrials.
- Some terrestrials move into the water during the dry season.
Noun
technical
C1
entity
6
rocky, Earth-like planet
A planet made mostly of rock, like Earth or Mars, not a gas planet like Jupiter.
Usage pattern:
a terrestrial; inner terrestrials; gas giants and terrestrials
Common mistake:
Learners sometimes think "terrestrial" here must mean "Earth" specifically, but it refers to any rocky planet with a solid surface, not just Earth.
Synonyms
rocky planet (More descriptive and easier for non-specialists; "terrestrial" is the standard technical term in astronomy.)
Antonyms
gas giant (Refers to large planets made mostly of gas, contrasting with solid-surface terrestrial planets.)
Collocations
a terrestrial
|terrestrial planet
|inner terrestrials
|rocky terrestrials
|giant planets and terrestrials
Themes
science
|space
Examples
- Astronomers discovered a terrestrial orbiting a nearby star.
- The inner terrestrials of our solar system are Mercury, Venus, Earth, and Mars.
- They studied how atmospheres form on small terrestrials.
- The mission will compare icy moons with rocky terrestrials.
- Some exoplanets classified as terrestrials may still be very different from Earth.
Learner examples
- Earth is a terrestrial, not a gas giant.
- Mars is a cold terrestrial in our solar system.
- Scientists found a new terrestrial around that star.
- The inner terrestrials move quickly around the sun.
- They want to know if this terrestrial could have water.
Grammar
Dictionary form
terrestrial
IPA
GB/tɚˈɛstɹiəl/
US/tɚˈɛstɹiəl/
Syllables & stress
ter - restri - al (3 syllables)
Stress on 1st syllable (ter)
Word forms
Adjective
- Base: terrestrial
Noun
- Base: terrestrial
- Plural: terrestrials
Word family
Forms
terrestrials
noun
Core family
extraterrestrial
adjective
Related words
Negative and opposite forms
non-terrestrial
adjective
Advanced or less common
terrestrially
adverb
subterranean
adjective C1
Expressions
terrestrial animals
1/tɚˈɛstɹiəl ˈænəməlz/
fixed phrase
animals that live on land
Animals that normally live on land, not in water.
Examples
- Zoos often separate aquatic species from terrestrial animals.
- Most large terrestrial animals in the region are threatened.
- Children learned the difference between fish and terrestrial animals in science class.
terrestrial ecosystem
1/tɚˈɛstɹiəl ˈikoʊsˌɪstəm/
fixed phrase
technical
ecosystem on land
All the plants, animals, and other life that live together in an area on land, not in water.
Examples
- Climate change is reshaping terrestrial ecosystems worldwide.
- Forests are some of the most complex terrestrial ecosystems.
- The study compares marine and terrestrial ecosystems along the coast.
terrestrial life
1/tɚˈɛstɹiəl lˈaɪf/
fixed phrase
life that exists on Earth
All life that lives on Earth, as opposed to life on other planets.
Examples
- Some scientists study how terrestrial life might have started.
- The discovery raised questions about how unique terrestrial life really is.
- They compared possible alien organisms with familiar forms of terrestrial life.
terrestrial planet
1/tɚˈɛstɹiəl plˈænət/
fixed phrase
technical
rocky, Earth-like planet
A planet that has a solid rock surface, like Earth, Mars, Venus, or Mercury.
Examples
- Mars is the most explored terrestrial planet after Earth.
- Astronomers debate whether a distant terrestrial planet could support life.
- The inner solar system is dominated by small terrestrial planets.
terrestrial television
1/tɚˈɛstɹiəl tˈɛləvˌɪʒən/
fixed phrase
TV broadcast from land transmitters
Television that is sent from towers on land and received with an antenna, not by satellite or cable.
Examples
- Before cable was installed, they only watched terrestrial television.
- The government plans to shut down all analogue terrestrial television signals.
- In some regions, public channels are still available only on terrestrial television.