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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
grammer slack: grammer slack: The tolerance exhibited by most Internet users for small spelling and grammar errors (such as spelling "grammar" as "grammer," an all-too frequent gaffe of people who do complain about other people's mistakes). Word Spy