<p><strong>Adjective:</strong></p><ul><li>Calmer, calmest.<ul><li>Without rough motion; still or nearly still: a calm sea.</li><li>Not windy or stormy: a calm day.</li><li>Free from excitement or passion; tranquil: a calm face; a calm manner.</li></ul></li></ul><p><strong>Synonyms:</strong></p><ul><li>Motionless, quiet, self-possessed, serene, unruffled, placid.</li></ul><p><strong>Antonyms:</strong></p><ul><li>Tempestuous, agitated.</li></ul><p><strong>Noun:</strong></p><ul><li>Freedom from motion or disturbance; stillness.</li><li>Freedom from agitation, excitement, or passion; tranquility; serenity.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>To make calm: He calmed the excited dog.</li></ul><p><strong>Synonyms:</strong></p><ul><li>Soften, soothe, mollify, assuage, allay, tranquilize, quiet, still.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>To become calm (usually followed by down).</li></ul>