n.
Function: intransitive verb
Date: before 12th century
1 : to become cool : lose heat or warmth <placed the pie in the window to cool > ― sometimes used with off or down
2 : to lose ardor or passion <his anger cool ed >
transitive verb
1 : to make cool : impart a feeling of coolness to < cool ed the room with a fan> ― often used with off or down <a swim cool ed us off a little>
2 a : to moderate the heat, excitement, or force of : CALM < cool ed her growing anger> b : to slow or lessen the growth or activity of ― usually used with off or down <wants to cool off the economy without freezing it ― Newsweek >
– cool it : to calm down : go easy <the word went out to the young to cool it ― W. M. Young>
– cool one's heels : to wait or be kept waiting for a long time especially from or as if from disdain or discourtesy