Cold is the opposite of hot. It can refer to temperature, passion, friendliness, and even your personality.
All cold things are icy in some way. Your tea can be cold, and someone can be cold to you. If a play leaves you cold, you don't like it. If police find a criminal’s trail has gone cold, they're out of clues. If you're searching for something, and someone tells you you’re "very cold," it means you're not very close to the prize. A cold is also the infection that gives you a runny nose and sore throat.