n. 1 quiet, stillness, tranquillity, serenity, hush, peace, peacefulness A storm raged outside, but in the harbour was a breathless calm 2 calmness, composure, placidity, placidness, peace, repose, sang-froid, coolness, self-control, equanimity, self-possession The calm exhibited by the passengers during the hijacking was admirable
adj. 3 quiet, still, tranquil, serene, peaceful, balmy, halcyon, mild, undisturbed, unagitated, placid, pacific; motionless, smooth, even; windless The sea is never calm in the same sense as a mountain lake 4 composed, cool, cool-headed, self-controlled, impassive, dispassionate, unmoved, unruffled, serene, tranquil, sedate, staid, stoical, Colloq together She remained calm while the others panicked
v. 5 Also, calm down. quiet, quieten, still, soothe, hush, lull, pacify; mollify, appease, placate, become or make quiet or pacified or less agitated, Colloq cool off or down The arbitrator did his best to calm the two litigants by suggesting a compromise After everyone had calmed down, the speaker continued.