The party who initiates a lawsuit; a plaintiff.(noun)
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Use "pursuer" in a sentence
"In such a case, the only women who will interfere and warn the intended victim will be his own relatives – a mother or a sister; others, while under no delusions as to the interested nature of the motives by which the pursuer is actuated, will hold their tongues, and even go so far as to offer facilities for the chase."
"The Bills 'all-time leader with 171 sacks, Smith's closest pursuer is current DE Aaron"
"L. T.'s closest pursuer is Minnesota rookie Adrian Peterson, who has 1,305 yards after being held to just 27 yards on nine carries in a loss to Washington on Sunday night."