I haven't got any sleep in a fortnight.
Yes, "fortnight" is a noun. It refers to a period of two weeks.
I haven't got any sleep in a fortnight.
A period of two weeks is also known as a fortnight.
I will be going on vacation in a fortnight, so I need to finish all my work before then.
fortnight
28 daysImproved Answer:-There are 14 days in a fortnight
fortnight
Fortnight
A fortnight is a common English word, used all the time, which means a period of fourteen days.
Fortnight
Noun since it is an object or a unit of time equal to 14 nights or 2 weeks.