Definition of "WR"

(sports, speedrunning) Initialism of world record.  examples

(American football, Canadian football) Initialism of wide receiver.  examples

(astronomy) Initialism of Wolf-Rayet star.  examples

Initialism of Wassermann reaction.  examples

(rugby union) Initialism of World Rugby, the international governing body for rugby union.  examples

(British) Initialism of William Rex. The royal cypher for William IV, king of Great Britain  examples