within the limits; within the framework; within the boundaries
Used for being inside a defined range, such as a budget, time limit, rule, or physical boundary.
予算は枠内に収める必要がある。
We need to keep the budget within the limits.
この書類の枠内に記入してください。
Please fill in the form within the box.
We operate within the bounds of the law.
I tried to keep it within the budget.
This plan falls within the budget.
枠外 means outside the framework or limits, the direct opposite of 枠内 which means inside them.
Compound of 枠 (わく, 'frame, limit') and 内 (ない, 'inside').