device in WordNet English dictionary

1. any clever maneuver
   "he would stoop to any device to win a point"; "it was a great sales gimmick"; "a cheap promotions gimmick for greedy businessmen"
   device  gimmick  twist 
   
2. an instrumentality invented for a particular purpose
   "the device is small enough to wear on your wrist"; "a device intended to conserve water"
   device 
   
3. an emblematic design (especially in heraldry)
   "he was recognized by the device on his shield"
   device 
   
4. any ornamental pattern or design (as in embroidery)
   device 
   
5. something in an artistic work designed to achieve a particular effect
   device