showdown
n. countable B2 Upper Intermediate US //ˈʃoʊˌdaʊn// UK //ʃˈəʊdaʊn// show·down
n. a final meeting or fight that settles an argument or competition. It usually happens between two strong sides after a long period of tension.
n. a final confrontation or contest intended to resolve a dispute or determine a winner. Often implies a decisive climax to a period of escalating conflict.
The two teams are preparing for a final showdown this weekend.
After weeks of public arguments, the mayor and the governor met for a televised showdown over the new tax law.
The diplomatic standoff eventually culminated in a high-stakes showdown at the summit, where both leaders refused to concede on the primary territorial issue.
From show + down.
Usage
Commonly used in sports, politics, and cinematic contexts to describe a decisive battle.