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terrain

n.
US //tɝˈeɪn// UK //təɹˈeɪn// ter·rain
  1. 1 physical features of land (n.)
    B2 Upper Intermediate

    the physical features of an area of land, especially its shape and what is on it.

    the physical characteristics of a stretch of land, typically described in terms of its topography or suitability for specific activities.

    Example

    The soldiers struggled to move their heavy equipment across the rocky terrain.

    Example

    The rugged terrain of the highlands proved a significant obstacle for the rescue teams, who had to navigate steep cliffs and dense forests.

    Usage

    Often used with adjectives like 'rough', 'rugged', 'mountainous', or 'difficult'.

  2. 2 geological rock formation (n.)
    C1 Advanced Technical Science

    a specific area of land that is made of a particular type of rock.

    a single, distinctive rock formation or an area dominated by a specific group of rocks.

    Example

    The geologists studied the volcanic terrain to understand the island's history.

    Example

    The survey identified a unique metamorphic terrain that suggests the region was once part of a different tectonic plate.

    Usage

    Commonly used in geological surveys and academic papers.

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  1. 3 field of knowledge (n.)
    C1 Advanced Academic Formal

    a particular subject or area of activity.

    a metaphorical field of activity, knowledge, or experience.

    Example

    The new tax laws are difficult terrain for most small business owners.

    Example

    Navigating the ethical terrain of artificial intelligence requires a deep understanding of both technology and philosophy.

Origin

Unadapted borrowing from French terrain, from Latin terrenum (“land, ground”), neuter of terrenus (“consisting of earth”), from terra (“earth”).

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