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Definition of heartburn noun from the Oxford Advanced Learner's Dictionary

heartburn

noun
 
/ˈhɑːtbɜːn/
 
/ˈhɑːrtbɜːrn/
[uncountable]
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  1. a pain that feels like something burning in your chest caused by acid coming back up from your stomach
See heartburn in the Oxford Advanced American Dictionary
trait
noun
 
 
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