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Definition of caldera noun from the Oxford Advanced American Dictionary

 

caldera

 noun
noun
NAmE//kɔlˈdɛrə//
 
, NAmE//kælˈdɛrə//
 
, NAmE//kɔlˈdɪrə//
 
, NAmE//kælˈdɪrə//
 
(technology)
 
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a very large hole in the top of a volcano, usually caused by an eruption
See caldera in the Oxford Advanced Learner's Dictionary
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