noun
plural weeks
a period of seven days
In the U.S., a week is usually considered to start on Sunday and end on Saturday, while in the U.K. a week is usually considered to start on Monday and end on Sunday. [count]
[count] :any period of seven days in a row
[count] :the days from Monday through Friday when people usually work
week in and week out
also week in, week out
every week for many weeks :for a long time without stopping or changing