Industry or business activity; practical commercial enterprise or operations (often used in contexts like 'the business world').
彼は実業に身を投じて成功を収めた。
He devoted himself to business and achieved success.
実業界の人々が会合で意見を交換した。
People from the business community exchanged opinions at the meeting.
大学で学んだ知識を実業に活かす道を選んだ。
He chose to apply what he learned at university to business.