plural weeks
1
: a period of seven days
Note: 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.
the last week of the month
I can meet you sometime next week.
The menu changes each/every week.
I volunteer at the school once a week. [=once every week]
You can never be sure what will happen from one week to the next.
The menu changes from week to week.
These problems have continued week after week. [=for several or many weeks]
2
: any period of seven days in a row
The baby is two weeks old. [a two-week-old baby]
I'll be on vacation for two weeks starting this Tuesday.
That car rents for $200 a/per week.
We'll leave a week from today. [=seven days after today]
I arrived a week ago.
It took him two weeks to paint the house.
Sometimes he's away for weeks at a time.
The doctor said he wants to see me again in a week. = The doctor said he wants to see me again a week from now. = The doctor said he wants to see me again in a week's time.
3
: the days from Monday through Friday when people usually work
We're open from 9 to 5 all week.
He earns $500 a week at his job.
I'll be working next week.
He has a 40-hour work week.
Cite this Entry
“Week.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/week. Accessed 24 Jun. 2026.
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