1. A final, decisive confrontation or contest between two opposing parties
The two boxers had their showdown in the championship fight.
Os dois boxeadores tiveram sua confrontação decisiva na luta do campeonato.
2. A situation where hidden information is revealed, particularly in poker when players reveal their cards
At the showdown, he revealed he had a full house.
Na revelação das cartas, ele mostrou que tinha um full house.
3. A direct confrontation or clash, often involving conflict or disagreement
The company's showdown with the union lasted for weeks.
A confrontação da empresa com o sindicato durou semanas.