preposition

 

time before a particular period of time has finished

The ambulance arrived within 10 minutes.

 

distance less than a particular distance from something

She was born within 20 miles of New York.

 

inside inside an area, group or system

a dispute within the department

 

limit not outside the limits of something

The project was completed well within budget.

 

adverb

 

inside someone or something

The organization needs to change from within.