Definition of Device

Noun: device di'vIs

An instrumentality invented for a particular purpose
"the device is small enough to wear on your wrist"; "a device intended to conserve water"
Something in an artistic work designed to achieve a particular effect
Any clever manoeuvre
"he would stoop to any device to win a point";
- gimmick, twist
Any ornamental pattern or design (as in embroidery)
(heraldry) an emblematic design (especially in heraldry)
"he was recognized by the device on his shield"