noun. A plaintiff in an action commenced by petition.

noun. A petitioning creditor.

noun. One who presents a petition, either verbal or written.

noun. [lowercase, or cap.] In Eng, hist., same as addresser.

noun. One who presents a petition.

noun. Someone who presents a petition to a court.

noun. one praying humbly for something

noun. someone who petitions a court for redress of a grievance or recovery of a right

"The majority opinion simply addresses the merits of the case, while the dissent states that the petitioner is not entitled to relief under the prevailing mandamus standards."