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tiebreaker

[tahy-brey-ker]
noun
  1. a system for breaking a tie score at the end of regulation play by establishing a winner through special additional play, usually of a fairly short duration, as in tennis and soccer.
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Often tie·break.

Origin of tiebreaker

First recorded in 1960–65; tie + breaker1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tie-break

tie-break

tie-breaker

noun
  1. tennis a method of deciding quickly the result of a set drawn at six-all, usually involving the playing of one deciding game for the best of twelve points in which the service changes after odd-numbered points
  2. any contest or game played to decide a winner when contestants have tied scores
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012