—adj. 1. without rough motion; still or nearly still: a calm sea. 2. not windy or stormy: a calm day. 3. free from excitement or passion; tranquil: a calm face; a calm manner.
—n. 1. freedom from motion or disturbance; stillness.
2. Meteorol.wind speed of less than 1 mph (0.447 m/sec).
3. freedom from agitation, excitement, or passion; tranquillity; serenity: She faced the possibility of death with complete calm.