disconnection

noun3

1. •
   Severance of a physical connection.

   • The disconnection of the power cable shut down all the computers.
2. •
   Unexpected termination of a telephone connection.

   • A sudden disconnection cut me off in mid-phrase.
3. •
   Absence of rapport; the nonexistence of, or a breakdown of, effective communication.

   • There was a hopeless disconnection between the weary, old teacher and the spirited, young students.