Definition
The person who initiates a legal proceeding by filing a petition, essentially the one who gets the ball rolling on your date with the judicial system. In appeals, they're the party asking the higher court to review the lower court's decision, usually because they lost and would like a second opinion. The formal legal term for "the one who complained first."
Example Usage
The petitioner filed for divorce, initiating what would become a three-year exercise in how much two people can spend on attorneys while fighting over a couch.
Source: Legal procedure terminology
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See “petitioner” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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