ravine

Noun
  1. A deep narrow steep-sided valley (especially one formed by running water) (synset 109428665)
    is a type of: vale, valley - a long depression in the surface of the land that usually contains a river
    subtypes:
    • canon, canyon - a ravine formed by a river in an area with little rainfall
    • gorge - a deep ravine (usually with a river running through it)

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