'Invisibleness' definitions:

Definition of 'invisibleness'

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

Definition of 'Invisibleness'

From: GCIDE
  • Invisibleness \In*vis"i*ble*ness\, n. The quality or state of being invisible; invisibility. [1913 Webster]