noun A low temperature, especially in the atmosphere; cold weather; a cold environment. (my teeth chattered with the cold) A common viral infection in which the mucous membrane of the nose and throat becomes inflamed, typically causing running at the nose, sneezing, a sore throat, and other similar symptoms.
adjective Of or at a low or relatively low temperature, especially when compared with the human body. (a freezing cold day) Lacking affection or warmth of feeling; unemotional. (how cold and calculating he was) (of the scent or trail of a hunted person or animal) no longer fresh and easy to follow. (the trail went cold) Without preparation or rehearsal; unawares. (going into the test cold)