0 an opening or a device that allows fresh air to come into a closed space:
The bathroom had no window but it had an electric ventilator.
He was brought into intensive care shortly after the accident and immediately put on a ventilator.
Three days after surgery, she was taken off the ventilator, but had to go back on it a day later.
Early reports found death rates as high as 90% among COVID-19 patients on ventilators.
He was still in a critical ward, still breathing through a ventilator and still without feeling in any of his limbs.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.