1. (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

Definition categories: body, cavity, cavum

2. a waste pipe that carries away sewage or surface water

Similar word(s): sewer, sewerage

Definition categories: man–made, drain, drainpipe