Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A large crater formed by volcanic explosion or by collapse of a volcanic cone.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A large crater formed by a volcanic explosion or by collapse of the cone of a volcano.

from The Century Dictionary and Cyclopedia

  • n. A large kettle or caldron; hence, in geology, an amphitheatrical depression in a volcanic formation.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a large crater caused by the violent explosion of a volcano that collapses into a depression

Etymologies

Spanish, cauldron, caldera, from Late Latin caldāria; see cauldron.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Spanish caldera ("cauldron"), from Latin caldāria ("warm bath"). (Wiktionary)

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