High Quality Content by WIKIPEDIA articles! A Member of Parliament is a representative of the voters to a parliament. In many countries the term applies specifically to members of the lower house, as upper houses often have a unique title, such as senate, and thus also have unique titles for its members, such as senators. Members of parliament tend to form parliamentary parties with members of the same political party. The term Member of Parliament is often shortened in the media and in every day use to the initialism "MP".