A senate; also, a governing body in certain universities.(noun)
The Century Dictionary (Public Domain)
Use "senatus" in a sentence
"Pertinax himself was so determined not to be accused of despotism that he emulated Augustus by styling himself princeps senatus and declining to accept for his wife, Flavia Titiana, the title of Augusta."
"The congregation, perhaps instructed beforehand to act according to ancient ritual as the senatus populusque Romanus confirming a coronation, thrice cried out: “Hail to Charles the Augustus, crowned by God the great and peace-bringing Emperor of the Romans!”"
"On another occasion, the egregious Maximus Flatulus, who had just been appointed princeps senatus and was surrounded on the steps by sycophantic admirers, was advised by the soothsayer that a plague of locusts was coming to devour all the produce in his fields east of the city."