adjective

1. of a temperature significantly or noticeably lower than average, normal, expected, or comfortable; very chilly; frigid a cold wind
2. 1. without the proper heat or warmth this soup is cold
   2. without the proper heat, warmth, or warm-up period: said of tires, engines, etc.
3. dead
4. feeling chilled
5. without warmth of feeling; unfeeling; indifferent a cold personality
6. not cordial or kind; unfriendly a cold reception
7. sexually frigid
8. depressing or saddening; gloomy to realize the cold truth
9. not involving one's feelings; detached; objective cold logic
10. designating or having colors that suggest cold, as tones of blue, green, or gray
11. still far from what is being sought: said of the seeker
12. not strong or fresh; faint or stale a cold scent
13. ☆ Informal unconscious the boxer was knocked cold
14. Informal unlucky or ineffective a cold streak in baseball

Etymology: ME < OE (Anglian) cald < IE base *gel-, cold > cool, Ger kalt, L gelidus

adverb

1. ☆ absolutely; completely she was stopped cold
2. ☆ with complete mastery the actor had the lines down cold
3. with little or no preparation to enter a game cold

noun

1. 1. absence of heat; lack of warmth: often thought of as an active force
   2. a low temperature; esp., one below freezing
2. the sensation produced by a loss or absence of heat
3. cold weather
4. a contagious, viral infection of the respiratory passages, esp. of the nose and throat, characterized by an acute inflammation of the mucous membranes, nasal discharge, malaise, etc.