Main Entry:

ple·num

Pronunciation:

\ˈple-nəm, ˈplē-\

Function:

noun

Etymology:

New Latin, from Latin, neuter of plenus

Date:

1678

1 a: 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 body3: the quality or state of being full