A defensive maneuver in football that tries to protect against the pass. This type of defensive maneuver will utilize the linebackers and defensive backs
With zone defense the linebackers and defensive backs will cover specific areas of the field and try and make it difficult for the offensive quarterback to complete a pass. During a zone defense the linemen can also perform a blitz. If the linemen decide to go for a blitz then the other linemen will expand their zones so as to cover the now vacated zones. The negative side to performing a blitz during zone defense is that it leaves gaps in the pass defense. Despite the negative of these gaps a defense coordinator may still wish to use a blitz during a zone defense in the hopes of causing the quarterback to make a mistake that benefits the defensive team. The benefits to the defensive team could be an interception or an incompletion.