Both Uses

parliament
in
Blood, Toil, Tears and Sweat by Winston Churchill
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It was the evident wish and will of Parliament and the nation that this should be conceived on the broadest possible basis and that it should include all parties, both those who supported the late Government and also the parties of the Opposition.†

parliament = legislative assembly that passes laws (existing in some countries)
The appointment of the other Ministers usually takes a little longer, but I trust that when Parliament meets again, this part of my task will be completed, and that the administration will be complete in all respects.†
*

Definitions:

(1) (parliament with a lowercase "p")
a legislative assembly in certain countries (that can pass laws)
(2) (meaning too rare to warrant focus)
As a proper noun, you need to look at the context to determine the parliament to which Parliament is referring. For example, it could be the British Parliament, the European Union Parliament, the French Parliament, etc.