noun (n)

• an instrumentality invented for a particular purpose(noun.artifact)

  Example:
  The device is small enough to wear on your wrist.
  A device intended to conserve water.
  

  source: wordnet30
• something in an artistic work designed to achieve a particular effect(noun.communication)

  source: wordnet30
• any clever maneuver(noun.act)

  Example:
  He would stoop to any device to win a point.
  

  Synonym:
  gimmick, twist
  

  source: wordnet30
• any ornamental pattern or design (as in embroidery)(noun.artifact)

  source: wordnet30
• an emblematic design (especially in heraldry)(noun.artifact)

  Example:
  He was recognized by the device on his shield.
  

  source: wordnet30
• That which is devised, or formed by design; a contrivance; an invention; a project; a scheme; often, a scheme to deceive; a stratagem; an artifice.(noun)

  source: webster1913