intrusiveness

from WordNet (r) 3.0 (2006)

intrusiveness
    n 1: aggressiveness as evidenced by intruding; by advancing
         yourself or your ideas without invitation [syn:
         {intrusiveness}, {meddlesomeness}, {officiousness}]

from The Collaborative International Dictionary of English v.0.48

Intrusive \In*tru"sive\, a.
   Apt to intrude; characterized by intrusion; entering without
   right or welcome.
   [1913 Webster]

   {Intrusive rocks} (Geol.), rocks which have been forced,
      while in a plastic or melted state, into the cavities or
      between the cracks or layers of other rocks. The term is
      sometimes used as equivalent to {plutonic rocks}. It is
      then contrasted with effusive or volcanic rocks. --
      {In*tru"sive*ly}, adv. -- {In*tru"sive*ness}, n.
      [1913 Webster]