Meaning of DEVICE in English

(METHOD) [noun] [C] - a method which is used to produce an effect that you want to producea linguistic/literary/rhetorical deviceThe first-person narrator is a stylistic device that has been used by many novelists and poets throughout the ages.A trademark creates an image for a product and can be a powerful marketing device.That rather cool manner of hers is just a device to avoid having to talk to people. [+ to infinitive]

Cambridge English vocab.      Кембриджский английский словарь.