世せ界かい一いっ周しゅう

noun

round-the-world trip; circumnavigation; globe-trotting

Refers to traveling around the entire world, often as a single journey or a goal.

• 彼かれは世せ界かい一いっ周しゅうの旅たびに出でた。

  He set off on a round-the-world trip.

• 世せ界かい一いっ周しゅう航こう空くう券けんを買かった。

  I bought a round-the-world airline ticket.