obtrusiveness

from WordNet (r) 3.0 (2006)

obtrusiveness
    n 1: an unwelcome conspicuousness [ant: {unobtrusiveness}]

from The Collaborative International Dictionary of English v.0.48

Obtrusive \Ob*tru"sive\, a.
   Disposed to obtrude; inclined to intrude or thrust one's self
   or one's opinions upon others, or to enter uninvited;
   forward; pushing; intrusive. -- {Ob*tru"sive*ly}, adv. --
   {Ob*tru"sive*ness}, n.
   [1913 Webster]

         Not obvious, not obtrusive, but retired. --Milton.
   [1913 Webster]