belch pronunciation: function: verb etymology: middle english, from old english bealcandate: before 12th centuryintransitive verb 1 : to expel gas suddenly from the stomach through the mouth2 : to erupt, explode, or detonate violently3 : to issue forth spasmodically : gushtransitive verb 1 : to eject or emit violently lt;angrily belched insultsgt;2 : to expel (gas) from the stomach suddenly : eruct— belch noun