决赛 (jué sài) means 'final (round)'—the last and decisive match or competition in a tournament or contest. The character 决 (jué) means 'to decide' or 'to determine', conveying finality and resolution; 赛 (sài) means 'contest' or 'competition'. Together, they literally mean 'decisive contest', emphasizing that this round determines the ultimate winner. It is commonly used in sports, academic contests, talent shows, and esports.

This term appears in formal and informal contexts alike—whether reporting on the Olympics, announcing school debate finals, or discussing online gaming championships. While often preceded by qualifiers like '男子' (men’s), '女子' (women’s), or '单打' (singles), 决赛 itself functions as a standalone noun and rarely takes measure words unless specifying quantity (e.g., 一场决赛, 'a final'). It does not imply the *outcome*—only the stage—and is neutral in register, appropriate for both news reports and casual conversation.