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1.
Latin abrevation for Senatus Populusque Romanus, the Senate and the People of Rome
When the Roman Legions would go into battle they carried a plaqe with SPQR engraved on it.
by Disco Stu September 29, 2003
 
2.
rural lawyer with strong command of law yet unrefined philosophy
The SPQR caucus caused the party platform to shift inevitably to the right, in spite of the obvious contadictions in principle.
by Sartre July 18, 2003