terrestrial

adjective

ter·​res·​tri·​al tə-ˈre-st(r)ē-əl  -ˈres-chəl 

-ˈresh-

1

a

: of or relating to the earth or its inhabitants

terrestrial magnetism

b

: mundane in scope or character : prosaic

2

a

: of or relating to land as distinct from air or water

terrestrial transportation

b(1)

: living on or in or growing from land

terrestrial plants

terrestrial birds

(2)

: of or relating to terrestrial organisms

terrestrial habits

3

: belonging to the class of planets that are like the earth (as in density and silicate composition)

the terrestrial planets Mercury, Venus, and Mars

terrestrial noun

terrestrially adverb

Did you know?

Terrestrial might be a pretty down-to-earth word, but some of its relatives are out of this world. "Terrestrial" first appeared in English in the 15th century and derives from the Latin root terra, which means "earth." In the mid-1800s "extra-" was added to "terrestrial," giving us "extraterrestrial," an adjective that can be used to describe things (including science fiction creatures) that come from space. "Terrestrial" shares the "-al" suffix with "celestial," which was first used in the 14th century. Not surprisingly, "celestial" ("of or relating to the sky or visible heavens") traces back to the Latin for sky, "caelum."

Synonyms

• carnal
• earthborn
• earthbound
• earthly
• fleshly
• material
• mundane
• sublunary
• temporal
• terrene
• worldly

Examples of terrestrial in a Sentence

The toad has terrestrial habits, spending most of its time on shore.

scientists haven't even found all the terrestrial life on our planet

Recent Examples on the Web

Since the Voyager 2 flyby, ever-improving terrestrial telescopes, the Hubble spacecraft and the James Webb observatory have brought Neptune into clearer view, allowing scientists to advance their understanding of its skies, meteorology and moons. —Shi En Kim, Smithsonian Magazine, 5 Nov. 2024

SpaceX Starlink or OneWeb satellite internet services, for example, provide connectivity where traditional broadband is unavailable or as a backup to terrestrial land-line connectivity. —Scott Williams, Forbes, 24 Oct. 2024

Scientists are working to uncover their long-term effects not only on people but also on ecosystems like marine and terrestrial habitats. —Joe Salas, New Atlas, 3 Nov. 2024

Plastic comprises the biggest source of terrestrial litter in the state of California, accounting for seven of the 10 most common products left on beaches, according to the lawsuit. —Zack Budryk, The Hill, 1 Nov. 2024

Word History

Etymology

Middle English, from Latin terrestris, from terra earth — more at terrace entry 1

First Known Use

15th century, in the meaning defined at sense 1a

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Kids Definition

terrestrial

adjective

ter·​res·​tri·​al tə-ˈres-trē-əl  -ˈres-chəl 

-ˈresh-chəl

1

: of or relating to the earth or its living things

2

a

: of or relating to land as distinct from air or water

terrestrial transportation

b

: living on or in or growing from land

terrestrial plants

terrestrial birds