verb

• (transitive) To cause (food, drink etc.) to pass from the mouth into the stomach; to take into the stomach through the throat.
  "What the liquor was I do not know, but it was not so strong but that I could swallow it in great gulps and found it less burning than my burning throat."
• (transitive) To take (something) in so that it disappears; to consume, absorb.
  "The necessary provision of the life swallows the greatest part of their time."
• (intransitive) To take food down into the stomach; to make the muscular contractions of the oesophagus to achieve this, often taken as a sign of nervousness or strong emotion.
  "My throat was so sore that I was unable to swallow."
• (transitive) To accept easily or without questions; to believe, accept.
  "this humbug was readily swallowed by men who were supposed to be intelligent,"

noun

• (archaic) A deep chasm or abyss in the earth.
• (archaic) The mouth and throat; that which is used for swallowing; the gullet.
  "The door burst wide open, and he saw nothing but a gaping jaw extending from the threshold up to the lintel. "There is a mouthful for you," said the youngster, and threw the pauper boy into the swallow; "taste that! But let me see now who you are! Perhaps you are an old acquaintance?" And so it was; it was the devil who was about again."
• (nautical) The opening in a pulley block between the sheave and shell through which the rope passes.
  "In addition, j-lock shackles can pass through the swallow of a modern genoa track even with a sheet in tension already there, and this is very useful when preparing a sail change on the same tack."
• (Nigeria) Any of various carbohydrate-based dishes that are swallowed without much chewing, commonly paired and eaten with various types of soup.