If someone belches, they make a sudden noise in their throat because air has risen up from their stomach. Garland covered his mouth with his hand and belched discreetly. Belch is also a noun. He drank and stifled a belch
If a machine or chimney belches something such as smoke or fire or if smoke or fire belches from it, large amounts of smoke or fire come from it. Tired old trucks were struggling up the road below us, belching black smoke Suddenly, clouds of steam started to belch from the engine. = emit Belch out means the same as belch. The power-generation plant belched out five tonnes of ash an hour. the vast quantities of smoke belching out from the volcano