オープンセット

noun

open set

Loanword from English; used in technical contexts such as mathematics, computing, or film production to refer to a set that is not closed or a set constructed outdoors.

• 数すう学がくでは、開かい集しゅう合ごうはオープンセットとも呼よばれる。

  In mathematics, an open set is also called an 'open set'.

• このシーンはオープンセットで撮さつ影えいされた。

  This scene was filmed on an open set.