indefensible Meaning, Definition & Usage

  1. adjective satellite (of theories etc) incapable of being defended or justified
    untenable.
  2. adjective satellite not able to be protected against attack
  3. adjective satellite incapable of being justified or explained
    unwarranted; unjustifiable; unwarrantable; insupportable.

WordNet

In`de*fen"si*ble
Etymology
Pref. in- not + defensible: cf. OF. indefensible, indefensable.
Definitions
  1. Not defensible; not capable of being defended, maintained, vindicated, or justified; unjustifiable; untenable; as, an indefensible fortress, position, cause, etc.
    Men find that something can be said in favor of what, on the very proposal, they thought utterly indefensible. Burke.

Webster 1913