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Definition of terra

terra

/ˈtɛr.ə/
ter · ra

Plural:terrae
•
Adjective:terrene
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terra Lexical Profile

terra Game Scores & Validity

• noun

1

The planet Earth (typically capitalized as 'Terra'), the third planet from the Sun, especially in astronomical nomenclature or science fiction.

Example

"In the novel, colonists on Mars still refer to their ancestral homeworld as Terra."


2

Earth, soil, or dry land, especially as used in Latinate phrases or geological and planetary contexts.

Example

"The ancient cartographers labeled the unexplored regions at the edges of the map as terra incognita."


3

An extensive, elevated, light-colored highland mass or continent-like landmass on the surface of the Moon or another terrestrial planet such as Mars or Venus.

Example

"Planetary geologists compared the heavily cratered lunar terrae with the smoother, darker basaltic plains."

Synonyms
View all synonyms for terra

Word Nuance & Usage

When capitalized as 'Terra', it functions as a proper noun referring to the planet Earth, particularly in astronomical and science-fiction contexts; in lowercase, it is most frequently encountered in Latinate compounds and phrases such as 'terra firma' or 'terra incognita'.

• Rhymes for terra

Word Origin & Etymology

Borrowed directly from Latin terra ('earth, land, ground, soil'), which derives from the Proto-Indo-European root *ters- ('to dry'), originally referring to dry land as opposed to the sea.

Cite this Entry


Wordmom. (2026). Definition of Terra. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/terra
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