Holdout or Hold Out may refer to:

Sports edit

  • Holdout (sports), a player’s refusal to report to their team or failure to perform the services outlined in the terms of their contract

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Real estate edit

Other edit

  • Holdout (gambling), a device used to cheat in gambling
  • Holdout problem, in finance concerning bond redemption
  • Holdout weapon, a weapon, typically a pistol, which can be sneaked into areas where weapons are normally confiscated or prohibited
  • Japanese holdout, a World War II soldier in the Pacific who continued to fight after Japan surrendered
  • Holdout data set, in statistics and machine learning, data that has not been used to derive a model