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. A condition of no wind or a wind with a speed of less than 1 knot (1.15 miles per hour; 1.9 kilometers per hour), according to the Beaufort scale. Tranquility or serenity:"an unaccustomed reticence that I took to be the calm that follows rage"(Jeanne Marie Laskas).