De*fen"si*ble*ness (?), n. Capability of being defended; defensibility. Priestley.
De*fen"sive (?), a. [Cf. F. défensif.] 1. Serving to defend or protect; proper for defense; opposed to offensive; as, defensive armor.
A moat defensive to a house.
Shak.
2. Carried on by resisting attack or aggression; -- opposed to offensive; as, defensive war.