From Longman Dictionary of Contemporary Englishheartburnheart‧burn /ˈhɑːtbɜːn $ ˈhɑːrtbɜːrn/ noun [uncountable] MIan unpleasant burning feeling in your stomach or chest caused by acid from your stomach → indigestion
Examples from the Corpus
heartburn• My husband has suffered from heartburn on and off for years and has recently been diagnosed as having a hiatus hernia.• Warning: Consumers over the age of 16 are likely to experience severe indigestion, heartburn, regret and loose stools.• I felt a fearful indignation, like heartburn.• The pharmacist will advise which medicines are safe to take and how to cope with problems like heartburn.• There were no significant differences in the prevalence of heartburn and regurgitation among the different degrees of endoscopic oesophagitis.• Cynics might say it was nothing more than heartburn.• If your heartburn persists, see your doctor. 