Decider

Full definition of decider

(plural deciders)

(of a controversy, question, etc) A person, divinity, or authoritative text which decides.

1667, anon., "George Fox digg'd out of his burrowes, or An offer of disputation on fourteen proposalls...". John Foster, Boston, pp. 89-90:This written and revealed will of God I said was the Judge and Decider of all Questions.
1758, Aaron Leaming and Jacob Spicer, The grants, concessions, and original constitutions of the province of New-Jersey, Philadelphia, p. 680:The Determination of his Majesty, who is the only proper decider of this Matter.
1885, Friedrich Delitzsch, "General Notes: The Religion of the Kassites," Hebraica, vol 1 no 3 (Jan), p. 190:The god Adar, which, with its two oft-occurring idiographs Bar and Nin-ib, is preferably designated as the "Decider" (Entschneider).
1967, David_Gauthier, "How Decisions are Caused," The Journal of Philosophy, vol 64 no 5, 15 Mar, p. 151:Although the decider may know any of the principles in the sequence, he cannot know every such principle.
2006 April 18, George_W._Bush, White House press conference, Washington, DC:"I'm the decider, and I decide what is best."

(chiefly British, sports) An event or action which decides the outcome of a contested matter.

2007 Feb 22 (action), Liverpool show of unity recalls old magic Guardian Sport:. . . when the Welshman laid on the 74th-minute decider.
2007 Feb. 10 (event), France aim to end four years of regret with seven-week sacrifice, Guardian Sport:France will meet Ireland again in the probable decider for their World Cup pool.