Definition of invisable:
(adj) :
Unable to be seen; out of sight; not visible.
(adj) :
Not appearing on the surface.
(adj) :
(Internet) Apparently, but not actually, offline.
(adj) :
(psychology) That is ignored by a person.
(v) :
To make invisible, to invisiblize.
(n) :
(obsolete) An invisible person or thing; specifically, God, the Supreme Being.