Definition of fortnight in English:
1A period of two weeks.
- In the last seven years at home there were regular fortnights in hospital: periodic detention, we called it.
- He began to recover a fortnight ago and, after a sparkling piece of work last Tuesday, he was back on target.
- In the past fortnight six new sea lion pups have been born and two wolf cubs made their first public appearances.
Old English fēowertīene niht 'fourteen nights'.
Definition of fortnight in:
- US English dictionary