What is Baronage?

Legal Definition
The baronage is the collectively inclusive term denoting all members of the feudal nobility, as observed by the constitutional authority Edward Coke. It was replaced eventually by the term “peerage
-- Wikipedia
Legal Definition
In English law. The collective body of the barons or of the nobility-at large, Speiman.
-- Black's Law Dictionary
Legal Definition
The rank of a baron; a barony.
-- Ballentine's Law Dictionary