Wiktionary
vb. 1 to remove liquid using a pump 2 (context idiomatic English) to produce in large quantities
Usage examples of "pump out".
True, it has to be programmed initially by humans before it can pump out its information.
In order to pump out the water, steam engines were invented, and they could be used in quantity largely because the steam could be formed by burning coal under the water containers.
Supposing he managed to stop the water entering and pump out what was already in?
If this went on he would have to compensate the lack of thrust by lightening the toad: he would have to pump out the tons and tons of fresh water down there in the hold.
With the seawater blocked, we can pump out the water and drain all the works.
There's no way we can use the air lock in the rescue chamber to make repairs, because the hull is too damaged to make an airtight seal, pump out the water and have a crew go to work with cutting torches.
We not only had to pump out the mine, we had to pump out the mountain as well.
A chasmoendolithic strain, very hardy, very fast to propagate, very quick to pump out oxygen.