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plenum: plenum: 1. In the philosophy of the Stoics, the whole of space regarded as being filled with matter.
2. An assembly or meeting with all members present.
3. A condition, space, or enclosure in which air or other gas is at a pressure greater than that of the outside atmosphere.
4. The condition of being full; fullness.
5. A space completely filled with matter. American Heritage Dictionary
If the riches of the Indies, or the ... If the riches of the Indies, or the crowns of all the kingdom of Europe, were laid at my feet in exchange for my love of reading, I would spurn them all. Francois Fenelon