What is what does belch means?

Belch, also known as a burp, is an involuntary release of gas from the stomach through the mouth. It is caused by excess air that is swallowed when eating or drinking, or by the breakdown of food in the digestive system. Belching can also be a symptom of gastroesophageal reflux disease (GERD), a condition in which stomach acid flows back into the esophagus. Belching is considered normal and not a cause for concern unless it becomes excessive, frequent, or is accompanied by other symptoms such as chest pain or difficulty swallowing.