Definition of heartburn in English:

heartburn

Syllabification: heart·burn
Pronunciation: /ˈhärtˌbərn
 
/

noun

A form of indigestion felt as a burning sensation in the chest, caused by acid regurgitation into the esophagus.
More example sentences
  • Many patients mean heartburn or acid regurgitation, the classic symptoms of gastro-oesophageal reflux disease.
  • Antacids are used to relieve the symptoms of acid reflux, caused by heartburn or indigestion.
  • However, it may cause a feeling of warmth or burning in the chest, often called heartburn.
Synonyms

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Pronunciation: grəˈmɛːrɪən
noun
a person who studies and writes about grammar