petitioner
1. [ noun ] one praying humbly for something
Synonyms: supplicant suppliant
Examples:

: "a suppliant for her favors"

Related terms: applicant solicitor besieger canvasser postulant supplicate
2. [ noun ] (law) someone who petitions a court for redress of a grievance or recovery of a right
Synonyms: suer
Related terms: litigant plaintiff petition
Similar spelling:   petition
  petitionary
  petiteness