Definitions of complainant
  1. noun
    a person who brings an action in a court of law
    synonyms: plaintiff
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    defendant, suspect
    a person or institution against whom an action is brought in a court of law; the person being sued or accused
    petitioner, suer
    someone who petitions a court for redress of a grievance or recovery of a right
    type of:
    litigant, litigator
    (law) a party to a lawsuit; someone involved in litigation
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