■ noun a unit of distance equal to a minute of arc of a great circle, varying between approximately 2,014 yards (1,842 metres) at the equator and 2,035 yards (1,861 metres) at the pole.
SEA MILE
Meaning of SEA MILE in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004