coolness
n.the quality of being very stylish, impressive, or attractive. You use this to describe someone or something that looks great and makes you feel good about yourself.
n.the quality of being stylish, impressive, or attractive. Informal in register; often used to describe a person's appearance, a piece of technology, or a specific attitude.
“The new phone has a lot of coolness.”
“The designer's latest collection was praised for its unique coolness and modern edge.”
“The brand's success was built on a calculated coolness that appealed to a generation seeking authenticity in a world of mass-produced goods.”
From Middle English colnes, colnesse, from Old English cōlnes, cœ̄lnes, cēlnes (“coolness; cool air, breeze”), from Proto-West Germanic *kōlinassī, equivalent to cool + -ness. Cognate with Middle High German kuolnisse, küelnisse (“cooling, coolness”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.