ˌdesignated ˈdriver BrE AmE noun [countable]
someone who agrees not to drink alcohol when a group of friends go out together to a party, bar etc so that he or she can drive the others safely home
ˌdesignated ˈdriver BrE AmE noun [countable]
someone who agrees not to drink alcohol when a group of friends go out together to a party, bar etc so that he or she can drive the others safely home
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012