noun A conduit allowing liquid to flow out of an otherwise contained volume; a plughole
The drain in the kitchen sink is clogged.
noun An access point or conduit for rainwater that drains directly downstream in a (drainage) basin without going through sewers or water treatment in order to prevent or belay floods.
noun A natural or artificial watercourse which drains a tract of land.
;;Saganing Drain, Vermuyden's Drain, the South Drain river, Najafgarh drain
noun Something consuming resources and providing nothing in return.
That rental property is a drain on our finances.
noun An act of urination.
noun One terminal of a field effect transistor (FET).