noun
open course
Refers to an educational course or program that is open to the public, often without formal admission requirements. Common in contexts like MOOCs, university extension programs, or open lectures.
この大学ではオープンコースを無料で提供している。
This university offers open courses for free.
オープンコースに参加して新しいスキルを学
I took an open course and learned new skills.