/ ˈfɔːtnaɪt; NAmE ˈfɔːrt-/ noun
[ usually sing. ] ( BrE ) two weeks :
a fortnight's holiday
a fortnight ago
in a fortnight's time
He's had three accidents in the past fortnight.
••
WORD ORIGIN
Old English fēowertīene niht fourteen nights .
/ ˈfɔːtnaɪt; NAmE ˈfɔːrt-/ noun
[ usually sing. ] ( BrE ) two weeks :
a fortnight's holiday
a fortnight ago
in a fortnight's time
He's had three accidents in the past fortnight.
••
WORD ORIGIN
Old English fēowertīene niht fourteen nights .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005