Definition of swallow:
(v) :
to cause to pass from the mouth into the stomach; to take food down into the stomach; to make the muscular contractions of the oesophagous which this entails
"try not to swallow too much toothpaste."
(n) :
a deep
chasm or
abyss in the earth; the amount swallowed in one
gulp; the act of swallowing
"he took the aspirin with a single swallow of water."