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device

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noun [countable] British English pronunciation: device /dɪˈvaɪs/ 
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singulardevice
pluraldevices
  1. 1
    a machine or piece of equipment that does a particular thing

    Secure your bike with this simple locking device.

    device for:

    a device for measuring humidity in the air

    labour-saving device (=a machine that reduces the work you have to do):

    labour-saving devices like the dishwasher and the microwave

  2. 2
    a bomb

    The device exploded only a short distance away from her.

    a nuclear device

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