terrain

American  

[tuh-reyn] / təˈreɪn /

noun

1. a tract of land, especially as considered with reference to its natural features, military advantages, etc.

2. Geology. terrane.

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terrain British  

/ təˈreɪn, ˈtɛreɪn /

noun

1. ground or a piece of ground, esp with reference to its physical character or military potential

   radio reception can be difficult in mountainous terrain

   a rocky terrain

2. a variant spelling of terrane

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Etymology

Origin of terrain

1720–30; < French ≪ Vulgar Latin *terrānum, noun use of neuter of *terrānus of land. See terra, -an

Explanation

An ATV, or all-terrain vehicle, is useful for people who drive on lots of different terrain, hence the name. Terrain is a noun used to talk about the ground, when you're specifically interested in how it appears or is shaped. In times of war, you'll often hear the term "hostile terrain" used to describe a region with lots of mountains, vast stretches of desert, or impenetrable jungles. These are all areas of difficult terrain that are hard to pass. Much of humankind's history can be traced by its effort to alter the terrain. We've made mountains into meadows, rivers into lakes, and prairies into roads, all to make the terrain more livable for us. You could even go so far as to say that a person's psyche is mysterious terrain.

Example Sentences

More than $53 billion has been spent on the Artemis program alone over the last four years, and billions more have been allocated to the Commercial Lunar Payload Services and Lunar Terrain Vehicle programs.

From MarketWatch • Mar. 31, 2026

In 2023, former Olympian Michael Phelps became the brand ambassador for Chilly Goat, whose Alpine Terrain cold tub includes a water purification system and Wi-Fi and retails for $9,495.

From The Wall Street Journal • Nov. 7, 2025

In its most recent quarterly report, Terrain said the slump is affecting every aspect of the wine industry.

From Seattle Times • Aug. 13, 2023

But the curators of “Hostile Terrain ’94: The Undocumented Migration Project” wish they didn’t have to keep revisiting such lethal ground.

From Los Angeles Times • Nov. 3, 2022

Behind Notre-Dame, the cloister and its Gothic galleries spread out towards the north; on the south, the half-Roman palace of the bishop; on the east, the desert point of the Terrain.

From Notre-Dame De Paris by Hapgood, Isabel Florence

Related Words

• area
• contour
• field
• ground
• land
• province
• region
• soil
• territory
• topography
• turf