'Invisibility' definitions:

Definition of 'invisibility'

From: WordNet
noun
The quality of not being perceivable by the eye [syn: invisibility, invisibleness] [ant: visibility, visibleness]

Definition of 'Invisibility'

From: GCIDE
  • Invisibility \In*vis`i*bil"i*ty\, n.; pl. Invisibilities. [L. invisibilitas: cf. F. invisibilit['e].] The state or quality of being invisible; also, that which is invisible. "Atoms and invisibilities." --Landor. [1913 Webster]