1. The state of being connected
   "The internet has increased our sense of global connectedness";
   - connection, link
    
2. A relation between things or events (as in the case of one causing the other or sharing features with it)
   "The connectedness between the two incidents was obvious";
   - connection, connexion [Brit]

See also: connected, unconnected

Type of: relation, unification, union

Encyclopedia: Connectedness