[H]e had been engaged in divers hostile expeditions against the aborigines, and on all occasions had he shown a cool head and a resolute mind.

Joan had a cool head—the only cool head there—and she took command and brought order out of that chaos.

It requires a cool head, which Mr. Murray most assuredly has, as well as the ability to remain unruffled by bizarre apparitions.

A telegenic personality who connected easily with journalists, Gerberding quickly became the public face of the CDC—a rare cool head among a parade of increasingly confused health bureaucrats.

Cool head

Meaning

Noun