Definition of plenum
1a
: a space or all space every part of which is full of matter
b
: an air-filled space in a structure
especially
: one that receives air from a blower for distribution (as in a ventilation system)
2
: a general assembly of all members especially of a legislative body
3
: the quality or state of being full
Keep scrolling for more
Test Your Vocabulary
February 2021 Words of the Day Quiz
-
- Which is a synonym of perdure?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share plenum
Time Traveler for plenum
The first known use of plenum was in 1678
See more words from the same year