noun ple·num \ˈple-nəm, ˈplē-\

Definition of plenum

  1. 1a :  a space or all space every part of which is full of matterb :  an air-filled space in a structure; especially :  one that receives air from a blower for distribution (as in a ventilation system)

  2. 2 :  a general assembly of all members especially of a legislative body

  3. 3 :  the quality or state of being full

Origin and Etymology of plenum

New Latin, from Latin, neuter of plenus

First Known Use: 1678

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to criticize severely

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