What is "recirculating"

Usage examples of "recirculating".

It felt vaguely like holding my hand against a recirculating outlet in a swimming poolit was a tenuous thing, that felt like it might easily slide to one side.

Inside the cave, hooked up to its well-maintained diagnostics systems and its recirculating routines, lay one of the stainless-steel-and-Plexiglas deepsleep chambers he had long ago taken from the original colony ship.

To the left was a freestanding food pantry with a microwave, and to the right was a toilet, an exercise treadmill, and a deep clear pool of constantly recirculating water.

The heater kicked in with an angry growl and blasted hot, dry air, recirculating the aroma of stale smoke.

People had been here earlier -- the tiled floor was puddled, there were towels and bits of swimming costumes scattered around, and a welter of pool-side-safe plastic flutes stood or lay by champagne buckets on the tables or had fallen to the pretend-grass floor -- but the place was quiet and empty now and the waters lay level, undisturbed by even the slightest ripple now that the recirculating pumps had been switched off.