Definition of "cool" []

• Neither warm nor very cold; moderately cold: fresh, cool water; a cool autumn evening. (adjective)
• Giving or suggesting relief from heat: a cool breeze; a cool blouse. (adjective)
• Marked by calm self-control: a cool negotiator. (adjective)
• Marked by indifference, disdain, or dislike; unfriendly or unresponsive: a cool greeting; was cool to the idea of higher taxes. (adjective)
• Of, relating to, or characteristic of colors, such as blue and green, that produce the impression of coolness. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "More than a few Democratic politicians use the term cool or cold to describe the president."
• "Sebastian stood there, his expression cool and gloating, his arms outstretched, his fingers almost touching the tunnel walls."
• "She turned to face him, her expression cool and unreadable."