Cold, n.
  1. The relative absence of heat or warmth.
  2. The sensation produced by the escape of heat; chilliness or chillness.
  When she saw her lord prepared to part,
  A deadly cold ran shivering to her heart.   --Dryden.
  3. Med. A morbid state of the animal system produced by exposure to cold or dampness; a catarrh.
  Cold sore Med., a vesicular eruption appearing about the mouth as the result of a cold, or in the course of any disease attended with fever.
  To leave one out in the cold, to overlook or neglect him. [Colloq.]