: being, using, or containing a filter usually designed to remove 99.97 percent of airborne particles measuring 0.3 micrometers or greater in diameter passing through it

Word History

Etymology

high-efficiency particulate air (filter)

First Known Use

1965, in the meaning defined above

Time Traveler
The first known use of HEPA was in 1965

Dictionary Entries Near HEPA

Cite this Entry

“HEPA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/HEPA. Accessed 12 Nov. 2024.

Medical Definition

HEPA

adjective
: being, using, or containing a filter usually designed to remove 99.97% of airborne particles measuring 0.3 microns or greater in diameter passing through it
HEPA filters
HEPA vacuum cleaners
Etymology

high efficiency particulate air

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