What does "recirculating" mean?

present participle and gerund of recirculate

What is a synonym for "recirculating"?

Common synonyms include: closed-loop irrigation.

verb

verb ·Rare ·Advanced level

Verb

1
present participle and gerund of recirculate form-of, gerund, participle, present

"Ventilation systems would need to be overhauled to “minimize recirculating air.”"