American English

Definition of terrain noun from the Oxford Advanced American Dictionary

 

terrain

 noun
noun
NAmE//təˈreɪn//
 
[countable, uncountable]
 
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used to refer to an area of land when you are mentioning its natural features, for example, if it is rough, flat, etc. difficult/rough/mountainous, etc. terrain They walked for miles across steep and inhospitable terrain. Thesauruscountrylandscape countryside terrain land sceneryThese are all words for areas away from towns and cities, with fields, woods, and farms.country (often the country) an area that is away from towns and cities, especially one with particular natural, social, or economic features:She lives in the country. Texas is cattle country.landscape everything that you can see when you look across a large area of land, especially in the country:Iowa's landscape is mostly flat and grassy.countryside land outside towns and cities, with fields, woods, and farms. Countryside is usually used when you are talking about the beauty or peacefulness of a country area:a little town in the Vermont countrysideterrain (formal) land Terrain is used when you are describing the natural features of an area, for example if it is rough, flat, etc:The truck bumped its way over the rough terrain.land (usually the land) an area for farming:He has worked the land for twenty years. My parents grow all their own food and live off the land.scenery the natural features of an area, such as mountains, valleys, rivers, and forests, especially when these are attractive to look at:We stopped on the mountain pass to admire the scenery.Patterns mountainous/wild/rugged country/landscape/countryside/terrain/scenery beautiful/glorious/dramatic country/landscape/countryside/scenery open country/landscape/countryside/terrain/land rolling landscape/countryside to protect the landscape/countryside/land
See the Oxford Advanced Learner's Dictionary entry: terrain