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

:  the upper or anterior division of the animal body that contains the brain, the chief sense organs, and the mouth

:  the seat of the intellect :  mind

:  a person with respect to mental qualities

:  of, relating to, or intended for the upper or anterior division of the animal body that contains the brain, the chief sense organs, and the mouth :  of, relating to, or intended for the head (see ¹head 1)

:  principal, chief

:  located at the end that is upper or higher :  situated at the head (see ¹head 5a)

:  behead

:  to put the striking part of a weapon, tool, or implement on :  fit a head (see ¹head 9b) to

:  to form the uppermost extremity or projecting part of :  to form the head or top of