ven ‧ ti ‧ la ‧ tor /ˈventəleɪtə, ˈventɪleɪtə $ -tl-eɪtər/ BrE AmE noun [countable]
1 . a piece of equipment that puts fresh air into a room, building etc ⇨ fan
2 . a piece of equipment that pumps air into and out of someone’s lungs
on a ventilator
He was put on a ventilator but died two hours later.