Merriam-Webster Online Dictionary
week (noun)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
