WordWeb Online

1. A geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea

1. Hollow out as if making a cave or opening
   "The river was caving the banks"
   - undermine
    
2. Explore natural caves
   - spelunk [N. Amer], pothole [Brit]

Derived forms: caves, caved, caving

Type of: core out, explore, formation, geological formation, hollow, hollow out

Encyclopedia: Cave, MO Cave, Italy Cave Cave, Missouri Cave, West Virginia Cave, WV Cave, New Zealand