from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The state or quality of being indefeasible, of being incapable of being defeated
from the GNU version of the Collaborative International Dictionary of English
- n. The quality of being indefeasible.
from The Century Dictionary and Cyclopedia
- n. The quality or character of being indefeasible, or not liable to be made void: as, the indefeasibility of a title.
From indefeasible + -ity. (Wiktionary)