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

 

heartache

 noun
noun
BrE BrE//ˈhɑːteɪk//
 
; NAmE NAmE//ˈhɑːrteɪk//
 
[uncountable, countable] Unhappiness
 
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a strong feeling of sadness or worry The relationship caused her a great deal of heartache. the heartaches of being a parent See related entries: Unhappiness
See the Oxford Advanced American Dictionary entry: heartache