within
withinpreposition
UK/wɪˈðɪn/US/wɪˈðɪn/
TIME
B1before a period of time has passed
- You should get a reply within a week.
- The parcel arrived within two days.
DISTANCE
B1less than a particular distance from something
- The hotel is within walking distance of the beach.
INSIDE
B2inside an area, group or organization
- There are problems within the company.