plaintiff

The party that institutes a suit in a court.

In law, the person who begins a suit before a tribunal for the recovery of a claim: opposed to defendant.

Complaining.

One who commences a personal action or suit to obtain a remedy for an injury to his rights; — opposed to defendant.

See plaintive.

A party bringing a suit in civil law against a defendant; accusers.

a person who brings an action in a court of law