Толковый словарь английского языка - week

noun Etymology: Middle English weke, from Old English wicu, wucu; akin to Old High German wehha ~ and perhaps to Latin vicis change, alternation, Old High German wehsal exchange Date: before 12th century 1. any of a series of 7-day cycles used in various calendars, b. a ~ beginning with a specified day or containing a specified holiday , a ~ appointed for public recognition of some cause , 2. any seven consecutive days, a series of regular working, business, or school days during each 7-day period, a time seven days before or after a specified day