fort ‧ night S3 /ˈfɔːtnaɪt $ ˈfɔːrt-/ BrE AmE noun [countable usually singular] British English
[ Language: Old English ; Origin: feowertyne niht 'fourteen nights' ]
two weeks:
a fortnight’s holiday
in a fortnight’s time
a fortnight ago
fort ‧ night S3 /ˈfɔːtnaɪt $ ˈfɔːrt-/ BrE AmE noun [countable usually singular] British English
[ Language: Old English ; Origin: feowertyne niht 'fourteen nights' ]
two weeks:
a fortnight’s holiday
in a fortnight’s time
a fortnight ago
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012