[plee-nuh m, plen-uh m] /ˈpli nəm, ˈplɛn əm/

noun, plural plenums, plena
[plee-nuh, plen-uh] /ˈpli nə, ˈplɛn ə/ (Show IPA)
a full assembly, as a joint legislative assembly.
the whole of space regarded as being filled with matter (opposed to ).
noun (pl) -nums, -na (-nə)
an enclosure containing gas at a higher pressure than the surrounding environment
a fully attended meeting or assembly, esp of a legislative body
(esp in the philosophy of the Stoics) space regarded as filled with matter Compare vacuum (sense 1)
the condition or quality of being full

1670s, “filled space” (opposite of vacuum), from Latin plenum (spatium) “full (space),” neuter of adjective plenus “complete, full” (see plenary). The meaning “of a full assembly of legislators” is first recorded 1772.


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