IPA: /ˈpleɪˌɔf/
KK: /ˈpleɪˌɔf/
A series of games played to decide the winner of a competition, especially in sports.
The teams are preparing for the playoffs next month.
Playoff → It is formed from "play" (from Old English *plegian*, meaning to engage in activity or sport) and "off" (meaning away or separate). The term "playoff" refers to a game or series of games that determine a champion, separating the best teams from the rest.
Think of engaging in a sport or activity ('play') to determine who is the best ('off' means separating the winners from the rest).