keep a cool head

: to retain in one's possession or power

: to refrain from granting, giving, or allowing

: to have in control

: the means or provisions by which one is kept

: one that keeps or protects: such as

: fortress, castle

: moderately cold : lacking in warmth

: marked by steady dispassionate calmness and self-control

: lacking ardor or friendliness

: to become cool : lose heat or warmth

: to lose ardor or passion

: to make cool : impart a feeling of coolness to

: a cool time, place, or situation

: absence of excitement or emotional involvement : detachment

: poise, composure

: in a casual and nonchalant manner