Plenum
/ˈpliːnəm/noun
A state or condition of fullness; in physics and engineering, a space completely filled with matter or air under pressure.
Did you know?In Latin, plenum was the neuter form of plenus, meaning “full,” and English kept it alive in technical and philosophical language to describe a space packed to capacity.
Etymological Timeline
Proto-Indo-European
PIE
*pleh₁-
“to fill, be full”
Latin
Latin
plenus
“full, filled”
Late Latin
Latin
plenum
“a full thing; full state”
17th Century
English
plenum
“a body or assembly with full attendance; a fully occupied space”
Modern English
English
plenum
“a space completely filled with matter or air under pressure”