Real Dictionary

disconnect
If you are disconnected by a gas, electricity, water, or telephone company, they turn off the connection to your house, usually because you have not paid the bill.
verb: To disconnect a piece of equipment means to separate it from its source of power or to break a connection that it needs in order to work.

disconnect in American English
a disconnection, as in an electrical system
to become disconnected
to break or undo the connection of; separate, detach, unplug, etc.
intransitive verb: to sever or terminate a connection, as of a telephone; hang up
noun: an act or instance of disconnecting, esp. the suspension of telephone or cable TV service for nonpayment of service charges
transitive verb: to sever or interrupt the connection of or between; detach

disconnect in British English
noun: a lack of a connection; disconnection
verb: to undo or break the connection of or between (something, such as a plug and a socket)