parliamentarian

noun

1. (Commonwealth)A member of a parliament, congress or an elected national legislative body of another name.
2. A person well-versed in parliamentary procedure.
3. (US)An officer in most legislative bodies charged with being well-versed in the parliamentary rules of that legislative house, and whose rulings are taken as authoritative, to be appealed only to the whole of the house itself under special rules.
4. (alt-of)Alternative letter-case form of parliamentarian, particularly
5. (historical)Alternative letter-case form of parliamentarian, particularly

adj

1. Of or relating to a parliament; favouring the establishment of a parliament.

   “a parliamentarian democracy; the parliamentarian movement”

   “1946, Office of United States Chief Counsel For Prosecution of Axis Criminality, Nazi Conspiracy and Aggression, Washington, Volume 1, citing Wilhelm Frick, Our participation in the parliament does not indicate a support, but rather an undermining of the parliamentarian system.”

2. (historical)Of or relating to the Parliamentarians (supporters of the parliament during the English Civil War (1642–1651)).

   “[...] Deputies were sent with Commissions into all the Counties; and the Parliamentarian Rebels by force and their own authority, invade the Militia, which they could not obtain from the King by petitioning.”

   “But while he continued there, he shew’d himself a Dunce, a Tale-bearer to the Parliamentarian Visitors that then acted in the University, and a factious person.”

   “The Scotch and parliamentarian army had joined, and were beſieging York; when prince Rupert, joined by the marquis of Newcaſtle, determined to raiſe the ſiege.”

   “There were large regions which were very decidedly royalist, others almost as distinctly parliamentarian [...]”