'Defensibility' definitions:

Definition of 'defensibility'

From: WordNet
noun
Capability of being defended; "they built their castles with an eye to their defensibility"; "client complaints create a felt need for the defensibility of individual actions"

Definition of 'Defensibility'

From: GCIDE
  • Defensibility \De*fen`si*bil"i*ty\, n. Capability of being defended. [1913 Webster]