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.]