ˌSunday ˈbest BrE AmE noun [uncountable] old-fashioned
your/her/my etc Sunday best your best clothes, which you wear only on special occasions. Traditionally, people always wore their best clothes for going to church on Sundays.
ˌSunday ˈbest BrE AmE noun [uncountable] old-fashioned
your/her/my etc Sunday best your best clothes, which you wear only on special occasions. Traditionally, people always wore their best clothes for going to church on Sundays.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012