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

This type of terrain can allow seawater to move beneath the glacier during high tide, temporarily lifting sections of ice off the ground.

From Science Daily • May 19, 2026

ESA's Mars Express mission is spotlighting Shalbatana Vallis this month, an enormous Martian valley marked by evidence of ancient water, volcanic activity, impact craters, and collapsed terrain.

From Science Daily • May 15, 2026

Jessica Curl, 47, remembers growing up nearby “in a terrain of trunks” as trucks carried out logs.

From Los Angeles Times • May 10, 2026

North Halmahera police chief Erlichson Pasaribu said that retrieval of the bodies, which are located at higher elevations, has been hampered by repeated eruptions, difficult terrain and strong blasts from the volcano.

From BBC • May 8, 2026

The steep, rocky terrain forced them to leave the river and approach the loud noise from the side.

From "The Very, Very Far North" by Dan Bar-el

Related Words

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