(of an installation etc) capable of being defended against armed attack / (of an argument etc) capable of being justified

Capability of being defended; defensibility.

Obsolete form of defender.

The state or quality of being defensible

plural of defensive

The action of defending or protecting from attack, danger, or injury. / (team sports) A strategy and tactics employed to prevent the other team from scoring; contrasted with offense.

Intended for defence; protective. / Intended to deter attack. / Performed so as to minimise risk. / Displaying an inordinate sensitivity to criticism or intrusion; oversensitive; thin-skinned.

A means, attitude or position of defense.

plural of defense

Prepared to defend or protect against criticism, attack or aggression. / (sports) defending; playing a defensive game