petitioner
nounA plaintiff in an action commenced by petition.
nounA petitioning creditor.
nounOne who presents a petition, either verbal or written.
noun[lowercase, or cap.] In Eng, hist., same as
One who presents a petition.
nounSomeone who presents a
one praying humbly for something
nounsomeone who petitions a court for redress of a grievance or recovery of a right