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1. A reflex that expels gas noisily from the stomach through the mouth
   - belching, burp [informal], burping [informal], eructation [formal]

1. Expel gas from the stomach
   - burp [informal], bubble, eruct [formal]
    
2. Become active and spew forth lava and rocks
   "Vesuvius belches once in a while";
   - erupt, extravasate

Derived forms: belched, belches, belching

Type of: breathe, burst, ejection, emit, explode, expulsion, forcing out, inborn reflex, innate reflex, instinctive reflex, pass off, physiological reaction, projection, reflex, reflex action, reflex response, unconditioned reflex

Encyclopedia: Belch