What is a Dual Degree?

Can someone tell me what exactly is a dual degree please?

Dual degree means you get two diplomas. Your majors are under different degree plans, for example the Jerome Fisher Program in Management & Technology at University of Pennsylvania is a program in which the students pursue degrees from School of Engineering and the Wharton School of Business. Students pursue a Bachelor of Science in Economics from the Wharton School and either a Bachelor of Science in Engineering (BSE) or a Bachelor of Applied Science in Engineering (BAS) from School of Engineering.