say it: VEN-tuh-lay-tur
ventilator is a noun meaning "a device (such as a fan) that introduces fresh air or expels foul air". It carries 2 recorded senses.
a device (such as a fan) that introduces fresh air or expels foul air
a device that facilitates breathing in cases of respiratory failure
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for ventilator come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.