Meaning of Calm down
Unknown / অজানা / अज्ञात
without rough motion; still or nearly still: a calm sea.
not windy or stormy: a calm day.
free from excitement or passion; tranquil: a calm face; a calm manner.
freedom from motion or disturbance; stillness.
Meteorology. wind speed of less than 1 mile per hour (0.447 m/sec).