A week is a group of seven days. People often use a week to measure time in daily life.
There are seven days in a week.
I work five days a week.
A workweek is the days people usually work. It often means Monday to Friday, not including weekend days.
The office is open five days a week.
The workweek starts on Monday.
In science or medicine, a week is a fixed time unit of seven days used for measuring experiments or treatments.
The patient took medicine for a week.
The data was collected over one week.
Some cultures and religions consider the week to start on Sunday and end on Saturday, which is a different way to divide the seven days.
Sunday starts the new week here.
Many cultures see the week from Sunday.
People sometimes say 'a bad week' or 'a hard week' to mean a time when many problems happen.
He had a bad week at school.
She feels tired after a tough week.
Sometimes people use 'week' informally to mean the time when they do not work or go to school, like the weekend.
We will relax this week.
Many people travel on the week.
