"we drained the swimming pool"

• cause or allow (liquid) to run off or out of something

  "fry the pork and drain off any excess fat"

• make (land) drier by providing channels for water to flow away in

  "the land was drained and the boggy ground reclaimed"

• (of a river) carry off the superfluous water from (an area)

  "the stream drains a wide moorland above the waterfall"

• (of water or another liquid) flow away from, out of, or into something

  "the river drains into the Pacific"

• become dry or drier as liquid runs off or away

  "dishes left to drain"

• drink the entire contents of (a glass or other container)

  "the stranger drained his glass of beer"

• (of a feeling or emotion) become progressively less strongly felt

  "gradually the tension and stress drained away"

"his limbs were drained of all energy"

• cause (a valuable resource) to be lost or used up

  "my mother's hospital bills are draining my income"

• (of a valuable resource) be lost or used up

  "all the money drained away from the town"

"whenever he did hit a green, he drained the putt"

• a frame of metal bars set in a road over the opening to a rainwater channel
• a tube for drawing off accumulating fluid from a body cavity or an abscess
• the part of a field-effect transistor to which the charge carriers flow after passing the gate

"nuclear power is a serious drain on the public purse"

• the continuous loss or expenditure of a particular resource

  "the drain of talented staff to the United States"