an argument, a fight or a test that will settle a disagreement that has lasted for a long time Management are facing a showdown with union members today. Fans gathered outside the stadium for the final showdown (= the game that will decide the winner of the competition).Extra examples He was now strong enough to force a showdown with them. Of course I’ll support you if it comes to a showdown. The council is heading for a showdown over the new proposals. The scene was set for the final showdown. the semi-final showdown with Australia last month the showdown against Holland in April the title showdown between Arsenal and United Fans gathered outside the stadium for the final showdown.