Interception

n.

1.

The act of intercepting; as, interception of a letter; interception of the enemy.

Noun	1.	interception - the act of intercepting; preventing something from proceeding or arriving; "he resorted to the interception of his daughter's letters"; "he claimed that the interception of one missile by another would be impossible"
	2.	interception - (American football) the act of catching a football by a player on the opposing team

bar, intercept, prevention, stop