If you are in your Sunday best , you are wearing your best clothes, which you only wear for special occasions.
N-SING : poss N
If you are in your Sunday best , you are wearing your best clothes, which you only wear for special occasions.
N-SING : poss N
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006