not showing or feeling nervousness, anger, or other strong emotions

she had to keep calm at all costs

his voice was calm

(of the weather) pleasantly free from wind

the night was clear and calm

the absence of strong emotions; calm feelings

his usual calm deserted him

the absence of wind

in the centre of the storm calm prevailed

make (someone) tranquil and quiet; soothe

I took him inside and tried to calm him down

(in Australia) the Department of Conservation and Land Management

the reserve contains some 500 species of plants and is managed by CALM