terrain

noun

ter·​rain tə-ˈrān 

also te-

1

a(1)

: a geographic area

(2)

: a piece of land : ground

b

: the physical features of a tract of land

2

: terrane sense 1

3

a

: a field of knowledge or interest

b

: environment, milieu

Synonyms of terrain

• area
• realm
• element
• field
• domain
• walk
• department
• sphere
• kingdom

Examples of terrain in a Sentence

We had to drive over some rough terrain.

We hiked through a variety of terrains.

Recent Examples on the Web

Two weeks into fighting, the unforgiving mountainous terrain, heavy Saudi and government air power, and a reenergized anti-Houthi coalition have kept the Houthi advance in check, preventing a collapse on the level of that in mid-September. — Brady Knox, The Washington Examiner, 4 Oct. 2026

To give the episodes shape, each is broken up into several mini-narratives, such as a mother cheetah learning to adapt her hunting style to mountainous rocky terrain in order to catch prey for her hungry cubs. — Jennifer Ouellette, ArsTechnica, 4 Oct. 2026

The project’s lengthy construction timeline and challenging terrain could push costs higher, while slowing demand could leave buyers locked into take-or-pay contracts lasting 20 years or more, Yoo said. — Jenny Lee, CNBC, 2 Oct. 2026

Tony Romo carved out new terrain at CBS Sports after revealing a knack for predicting game play — all but forcing CBS to re-sign the former Dallas Cowboys quarterback to a multi-season pact in 2020 valued at around $17 million a year. — Brian Steinberg, Variety, 2 Oct. 2026

Word History

Etymology

French, land, ground, from Old French terrein, from Vulgar Latin *terranum, alteration of Latin terrenum, from neuter of terrenus of earth — more at terrene

First Known Use

1766, in the meaning defined at sense 1a(1)

Phrases Containing terrain

• all-terrain vehicle

Rhymes for terrain

• abstain
• airplane
• alkane
• arcane
• arraign
• attain
• backplane
• betaine
• biplane
• blockchain
• butane
• campaign

Kids Definition

terrain

noun

ter·​rain tə-ˈrān 

also te-

: the surface features of an area of land

rough terrain