Coolness is an admired aesthetic of attitude behavior comportment
Coolness is an admired aesthetic of attitude behavior comportment appearance and style influenced by and a product of the Zeitgeist
Because of the varied and changing connotations of cool as well as its subjective nature the word has no single meaning
It has associations of composure and selfcontrol and often is used as an expression of admiration or approval
Although commonly regarded as slang it is widely used among disparate social groups and has endured in usage for generations