Definition of a week
: each week <I volunteer at the school once a week.>
Word by Word Definitions
: any of a series of 7-day cycles used in various calendars
: a 7-day cycle beginning on Sunday and ending on Saturday
: a week beginning with a specified day or containing a specified holiday
Seen and Heard
What made you want to look up a week? Please tell us where you read or heard it (including the quote, if possible).