con·fines 
(kŏnfīnz′)
(kŏnfīnz′)pl.n.
1. The limits of a space or area; the borders: within the confines of one county.
2. Restraining elements: wanted to escape the confines of corporate politics.
3. Purview; scope: a theory that is well within the confines of science.
[Old French confins, boundaries, from Latin cōnfīnia, pl. of cōnfīnium, boundary, from cōnfīnis, adjoining : com-, com- + fīnis, border.]