cave

Noun
  1. A geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea (synset 109261832)
    is a type of: formation, geological formation - (geology) the geological features of the earth
    subtypes:
    • cavern - a large cave or a large chamber in a cave
    • cove - small or narrow cave in the side of a cliff or mountain
    • grot, grotto - a small cave (usually with attractive features)
    specific instances:
    • fingal's cave - a large cave with basaltic pillars on Staffa island in Scotland
    • lascaux - a cave in southwestern France that contains Paleolithic paintings
    has:
    • floor - the lower inside surface of any hollow structure
    • roof - the inner top surface of a covered area or hollow space
    • stalactite - a cylinder of calcium carbonate hanging from the roof of a limestone cave
    • stalagmite - a cylinder of calcium carbonate projecting upward from the floor of a limestone cave
    • wall - a vertical (or almost vertical) smooth rock face (as of a cave or mountain)
Verb
  1. Hollow out as if making a cave or opening (synset 201285636)
    "The river was caving the banks"
    is a type of: core out, hollow, hollow out - remove the interior of
    subtypes: sap - excavate the earth beneath
    same as: undermine
  2. Explore natural caves (synset 200651540)
    is a type of: explore - travel to or penetrate into
    same as: spelunk

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