the Senate and People of Rome.
Origin of S.P.Q.R.
From the Latin word Senātus Populusque Rōmānus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Senatus Populusque Romanus
Word Origin for SPQR
Latin: the Senate and People of Rome.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
the insignia of Rome, from Latin Senatus Populusque Romanus "the Senate and People of Rome."
Online Etymology Dictionary, © 2010 Douglas Harper