The word dual means consisting of or involving two parts or components, usually in pairs. Thus there are dual controls in the cockpit, for the pilot and the co-pilot, and of course, these days dual -SIM mobile phones are available too.
If you are going to see your grandparents and visit the annual village fair, then your visit has a dual purpose.
If you are a person who can be sugar-sweet at times and nasty at other times, then you will be branded as a person who has a dual personality!
The adjective dua l is derived from the Latin term dualis , related to duo , the Latin word for two. Duo , which was borrowed into English, is a synonym for two. A related word, duet , refers to performance by a pair of singers (who constitute a duo ).
