1. machines that help people breathe by moving air into and out of their lungs
Usage: medical
2. devices that move fresh air into a room or building and remove stale air

Examples

• The hospital had to order more ventilators during the pandemic.
• Patients in the ICU were connected to ventilators to help them breathe.
• The building’s ventilators keep the air fresh throughout the offices.
• Industrial ventilators remove harmful fumes from the factory floor.
• The old mine used large ventilators to circulate air underground.
• Modern ventilators can automatically adjust to a patient’s breathing patterns.