¹ cool adjective

• somewhat cold : not warm or hot
• made of a light, thin material that helps you stay cool
• able to think and act in a calm way : not affected by strong feelings

² cool verb

• to make (someone or something) cool —often + off or down
• to become cool : to lose heat or warmth —often + off or down
• to become less strong or intense especially in emotion —often + off or down

³ cool noun

⁴ cool adverb

• in a calm manner : in a way that does not seem unusual or excited