drain

Definitions

General English

Accounting

  • noun a gradual loss of money flowing away

Agriculture

  • noun an underground pipe which takes waste water from buildings or from farmland
  • noun an open channel for taking away waste water
  • noun a device to allow fluid to escape from its container

Aviation

  • verb to allow fluid to escape by providing a hole or tube, etc., through which it can pass

Cars & Driving

  • noun a passage or piece of tube which takes water away from places in the bodywork where it tends to accumulate, such as the edge of the sunroof
  • verb to empty (the sump, radiator, etc.) of a liquid

Construction

  • A pipe, ditch, or trench designed to carry away waste water.

Electronics

  • The current, power, or energy drawn from a source. Also, the load or process that draws this current, power, or energy.
  • In a field effect transistor, the region into which the majority carriers flow from the source. The output of such a transistor is usually taken from the drain, which is analogous to the collector of a bipolar transistor, or the anode of an electron tube. Also, the electrode attached to this region. Its symbol is D. Also known as drain region, or drain electrode.
  • symbolD

Food

  • verb to empty or dry something by allowing the water to flow out of or off it, or become empty or dry in this way

Medical

  • noun a tube to remove liquid from the body

Real Estate

  • noun a pipe or channel that carries water or sewage away from a place

Origin & History of “drain”

The underlying meaning of drain seems to be ‘making dry’. It comes ultimately from *draug-, the same prehistoric Germanic base as produced English drought and dry, and in Old English it meant ‘strain through a cloth or similar porous medium’. There then follows a curious gap in the history of the word: there is no written record of its use between about 1000 ad and the end of the 14th century, and when it re-emerged it began to give the first evidence of its main modern meaning ‘draw off a liquid’.
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