- 1not excited, nervous, or upset It is important to keep calm in an emergency. Try to remain calm. Her voice was surprisingly calm. The city is calm again (= free from trouble and fighting) after yesterday's riots.
- 2(of the ocean) without large waves
- 3(of the weather) without wind a calm, cloudless day
- adverb “I'll call the doctor,” he said calmly.
- noun [uncountable]
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