(~s)
A ~ is a year which has 366 days. The extra day is the 29th February. There is a ~ every four years.
N-COUNT
(~s)
A ~ is a year which has 366 days. The extra day is the 29th February. There is a ~ every four years.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012