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

 

heartbreak

 noun
noun
BrE BrE//ˈhɑːtbreɪk//
 
; NAmE NAmE//ˈhɑːrtbreɪk//
 
[uncountable, countable] Unhappiness
 
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a strong feeling of sadness They suffered the heartbreak of losing a child through cancer. See related entries: Unhappiness
See the Oxford Advanced American Dictionary entry: heartbreak