Simple Definition of ventilator

from our Learner's Dictionary

ventilator

noun

plural ventilators
1
: a device that lets fresh air enter and move through a room, building, etc.
2
medical : a device for helping a person to breathe : respirator
The patient was put on a ventilator.

Cite this Entry

“Ventilator.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/ventilator. Accessed 9 Jul. 2026.

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