/ beltʃ; NAmE / verb
1.
[ v ] to let air come up noisily from your stomach and out through your mouth :
He wiped his hand across his mouth, then belched loudly.
SYN burp
2.
[ v , vn ] belch (out / forth) (sth) to send out large amounts of smoke, flames, etc.; to come out of sth in large amounts
SYN spew out
► belch noun :
He sat back and gave a loud belch.
••
WORD ORIGIN
Old English belcettan , probably imitative.