What is Within?
Within is (prep) 1. (in space or time) in The house is within easy reach of the station. We are within walking distance of the shop. I must go back for a checkup within three months. They promised to deliver the sofa within a week. within sight able to be seen We are almost there, the house is within sight. The ship sank within sight of land. 2. within the law legal Is parking on the pavement within the law?
source: Easier English, Student Dictionary Upper Intermediate Level