noun
1. : one picked to fill a leftover tournament or play-off berth after regularly qualifying competitors have all been determined
2. : an unknown or unpredictable factor
noun
1. : one picked to fill a leftover tournament or play-off berth after regularly qualifying competitors have all been determined
2. : an unknown or unpredictable factor
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012