- Nearly or completely motionless; undisturbed: the calm surface of the lake.
- Not excited or agitated; composed: The President was calm throughout the global crisis.
- An absence or cessation of motion; stillness.
- Serenity; tranquillity; peace.
- A condition of no wind or a wind with a speed of less than 1 mile (2 kilometers) per hour, according to the Beaufort scale.
- To make or become calm or quiet: A warm bath will calm you. After the storm, the air calmed.