Disconnection

noun

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."