オープン選せん手しゅ権けん

noun

open championship; open competition

Refers to a tournament or contest open to all qualified entrants, often used in sports contexts like golf or tennis.

• 全ぜん米べいオープン選せん手しゅ権けんはテニスの四よん大だい大たい会かいの一ひとつです。

  The US Open Championship is one of the four major tennis tournaments.