1. On the inside; internally
   "The problem lies within, not in external factors";
   - inside

1. Internal to, not outside; located in the bounds of
   "within the house";
   - inside, in
    
2. Not more or further than, in the limits of
   "fixed within an hour"; "within a whisker of losing"; "she's within sight"
    
3. Internal to, involving members of (a group of people)
   "they argued within themselves";
   - among, amongst, between

Encyclopedia: Within