noun
week
WEEK/wiːk/
A period of seven days.
The highlighted row marks one complete week of seven consecutive days.

Etymology
Old English wucu already named a recurring seven-day period. Its deeper history probably involved “turning” or “succession,” suggesting a cycle that returns rather than just a count of days.
In context
the proposed hours of operation are nine am to nine pm seven days a week
More examples
- The project took two weeks.
- Next week is our vacation.
- She works five days a week.
Forms
week · weeks
Similar words
- hebdomad
- Rare formal term for a seven-day period.