bound

bound is a Noun

Definition:

[1] The external or limiting line, either real or imaginary, of any object or space; that which limits or restrains, or within which something is limited or restrained; limit; confine; extent; boundary. He hath compassed the waters with bounds. Job xxvi. 10. On earth`s remotest bounds. Campbell. And mete the bounds of hate and love. Tennyson. To keep within bounds, not to exceed or pass beyond assigned limits; to act with propriety or discretion.