This means something is not warm or hot. It refers to a temperature that feels nice or slightly cold.
The water is cool and fresh.
It's cool outside today.
Here, 'cool' means something or someone fashionable or popular. People use it to say something is good or nice.
That jacket looks very cool.
He is a cool person at school.
'Cool' as a verb means to make something less hot or warm. People often cool drinks or food to make them nice to eat or drink.
Please cool the soup before eating.
The wind cooled the room quickly.
People say 'cool' as a verb to mean relax or calm down when you feel upset or angry. It helps to become less excited emotionally.
Cool down and breathe slowly.
He cooled off after the game.
This use means a person does not show strong feelings or excitement. The person acts indifferent or not easily impressed.
She gave a cool answer to my question.
He showed a cool attitude about winning.
In slang, 'cool' means very good or impressive. People say it to show they like something a lot.
That movie was really cool!
You have a cool new phone.
In technical contexts, 'cool' means something is not hot, often after being used. It is important before fixing or touching machines.
Let the engine cool before starting repair.
The computer was cool after shutting down.
