A caldera is a crater formed after the eruption of a volcano. The caldera is formed when the volcano collapses into itself.

Volcanoes are impressive forces of nature with the power to wreak enormous destruction when they erupt. One sign of that power is a caldera, which is a crater formed after a volcano has erupted and collapsed into itself. Some of the more ancient calderas formed mountains and valleys in the Rockies and elsewhere. A related word in English is cauldron, whose modern meaning (a vessel for hot liquids) can remind us of the molten lava of a volcano.

Definitions of caldera
  1. noun
    a large crater caused by the violent explosion of a volcano that collapses into a depression
    see moresee less
    type of:
    crater, volcanic crater
    a bowl-shaped geological formation at the top of a volcano
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week