Definition of week
1 a
:any of a series of 7-day cycles used in various calendars;
especially
:a 7-day cycle beginning on Sunday and ending on Saturday
b (1)
:a week beginning with a specified day or containing a specified holiday
- the week of the 18th
(2)
:a week appointed for public recognition of some cause
2 a
:any seven consecutive days
b
:a series of regular working, business, or school days during each 7-day period
3
British
:a time seven days before or after a specified day
- last Sunday week
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