English to English

noun (n)

• (zoology) the cavity (in birds, reptiles, amphibians, most fish, and monotremes but not mammals) at the end of the digestive tract into which the intestinal, genital, and urinary tracts open(noun.body)

  source: wordnet30
• a waste pipe that carries away sewage or surface water(noun.artifact)

  Synonym:
  sewer, sewerage
  

  source: wordnet30
• A sewer; as, the Cloaca Maxima of Rome.(noun)

  source: webster1913