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DictionaryplenumMatter-filled space
noun

plenum

Space conceived as completely filled with matter.

The philosopher describes the universe as a plenum with no empty space.

Etymology
plenumLatina full space

The Latin term means a full space. Philosophy and physics use it for space conceived as filled throughout with matter rather than containing a vacuum.

More examples

  • In a plenum, matter occupies every point in space.
  • Her argument assumes a plenum rather than a vacuum.
  • This theory explains motion as matter shifting within a plenum.

Forms

plenum · plenums · plena