When you disconnect something, you detach or separate it from something else. If you work plowing driveways during the winter, you need to disconnect the plow from your truck in the spring.

You can disconnect toy train cars, and you can also disconnect your laptop from its charger. In fact, unplugging electrical appliances is another way to disconnect something. Disconnect also means a lack of understanding or connection. So there might be a disconnect between you and your brother, or between what a politician promises to do and what she actually does. Disconnect combines dis-, "the opposite of" with connect, from the Latin conectere, "join together."

Definitions of disconnect
  1. verb
    make disconnected, disjoin or unfasten
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    connect, link, link up, tie
    connect, fasten, or put together two or more pieces
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    decouple, uncouple
    disconnect or separate
    cause to become detached or separated; take off
    break, break off, snap off
    break a piece from a whole
    untie or unfasten
    take off a hook
    type of:
    disunite, divide, part, separate
    force, take, or pull apart
  2. verb
    pull the plug of (electrical appliances) and render inoperable
    synonyms: unplug
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    connect, plug in, plug into
    plug into an outlet
    type of:
    cancel, annul, or reverse an action or its effect
  3. noun
    an unbridgeable disparity (as from a failure of understanding)
    “there is a vast disconnect between public opinion and federal policy”
    synonyms: chasm, disconnection, gulf
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    type of:
    inequality or difference in some respect
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