(~s)
A married couple’s ~ or ~ anniversary is the 25th anniversary of their wedding.
He and Helen celebrated their ~ last year.
N-COUNT: usu poss N
(~s)
A married couple’s ~ or ~ anniversary is the 25th anniversary of their wedding.
He and Helen celebrated their ~ last year.
N-COUNT: usu poss N
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012