Dual | Mean of dual in English Dictionary

/ˈduːwəl/

• having two different parts, uses, etc.
1. the dual purpose of the study
2. The song's lyrics have a dual [=(more commonly) double] meaning.
3. a dual function
4. She held dual citizenship in France and the United States. [=she was a citizen of both countries]
• having two of something
1. Our car has dual air bags. [=has two air bags]
2. She pursued dual careers in music and acting.
3. families with dual incomes