1. To exist inside of an established boundary. Our tribe was forced to live within a tiny area miles away from our homes after the federal government claimed our land for their own. The international peace-keeping committee once again stressed that both countries were required to live within the borders agreed upon in the peace treaty.
2. To survive or subsist within a certain budget or range of available resources. No matter what sacrifices to my personal comfort I have to make, I always make sure I live within my paycheck each month—I refuse to be saddled down with credit card debt. We're living within a tighter budget than we were used to, but we're learning to cope with it.
live within something
1. to live within certain boundaries. Do you think you can live within your space, or are we going to argue over the use of square footage? Ted demanded again that Bill live within his assigned area.
2. to keep one's living costs within a certain amount, especially within one's budget, means, etc. Please try to live within your budget. You must learn to live within your take-home pay every month.