noun
Grand Master (of an order)
Title for the head of a chivalric, fraternal, or religious order.
彼はテンプル騎士団のグランドマスターに任命された。
He was appointed Grand Master of the Knights Templar.
noun
Highest title awarded by FIDE in chess; also used in other competitive games.
彼女は若くしてチェスのグランドマスターになった。
She became a chess grandmaster at a young age.