An example of a plaintiff is a wife filing for divorce.
Origin of plaintiffMiddle English plaintif from OFr, mournful, making complaint from plaindre from plainte: see plaint
Origin of plaintiffMiddle English plaintif from Anglo-Norman pleintif from Old French plaintif aggrieved ; see plaintive .
From Middle English plaintif, from Old French plaintif (“complaining; as a noun, one who complains, a plaintiff") from the verb plaindre. See plaintive.