All 3 Uses

parliamentary
in
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The Government now gave way on all sides, and made a show of yielding to the demands of the people, though there was a widespread plot for effecting a coup d'etat set on foot between the leaders of the two socalled opposing parties in the parliamentary faction fight.†
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You know, of course, that it was the palace of our old mediaeval kings, and was used later on for the same purpose by the parliamentary commercial sham-kings, as my old kinsman calls them.†
He had an extraordinary detailed knowledge of the ancient history of the countryside from the time of Alfred to the days of the Parliamentary Wars, many events of which, as you may know, were enacted round about Wallingford.†

Definitions:

(1) (parliamentary)
relating to a form of democracy where the chief executive is selected by and answerable to and the legislature

In the United States, the chief executive (president) is elected separately from the legislative branch (congress). In a parliamentary system, the chief executive (prime minister) is selected by the majority party of the legislative branch (parliament). Many democracies, such as France, have a hybrid parliamentary/presidential system in which an elected president shares power with a prime minister.
(2) (meaning too rare to warrant focus)