petitioner

One who presents a formal, written application to a court, officer, or legislative body that requests action on a certain matter.

In legal proceedings initiated by a petition, the respondent is the person against whom relief is sought, or who opposes the petition. One who appeals from a judgment is a petitioner.

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petitioner n. one who signs and/or files a petition. (See: petition)

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petitioner noun applicant, asker, litigant, movant, one who applies for relief, one who files an application for relief, one who requests relief, party, pleader, solicitant, supplex, supplicant
Associated concepts: aggrieved party

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See also: accuser, actor, appellant, applicant, candidate, claimant, complainant, contender, litigant, malcontent, party, plaintiff, special interest, suitor, undersigned