n.
Function: noun
Date: 1552
1 : a means (as a pipe) by which usually liquid matter is drained
2 a : the act of draining b : a gradual outflow or withdrawal : DEPLETION
3 : something that causes depletion : BURDEN
4 : an electrode in a field-effect transistor toward which charge carriers move ― compare GATE , SOURCE
– down the drain : to a state of being wasted or irretrievably lost