Of or pertaining to Parliament, or, in general, to legislative bodies.Enacted or done by Parliament, or, in general, by the authority of a legislature: as, a parliamentary act; parliamentary government.In accordance with the rules and usages of Parliament, or, in general, with the rules and customs of legislatures; approved or allowed in legislative or deliberative bodies: as, parliamentary language.n. A member of Parliament.n. A Cromwell man; a parliamentarian.n. A parliamentary train.n. One sent to treat or parley with the enemy.