adjective
Definition: Having a temperature that is moderately cold or giving a sense of relief from heat; also describes someone who is calm and composed.
Example: The cool breeze felt refreshing on a hot day.
intransitive verb
Definition: To become less warm or to become calmer in feelings or emotions.
Example: After the argument, they needed some time to cool before talking again.
noun
Definition: A state or quality of being calm and composed, often in a difficult situation; also refers to a pleasant or moderate temperature.
Example: Despite the chaos around him, he managed to keep his cool during the meeting.