To me the word cool is kinda like fuck. It can pretty much mean whatever you want. I can image all of the following being called 'cool' for one reason or another, yet they're so very different.
Miles Davis
A steam-punk engineers' vest
Willie Nelson
Amazon Alexa
Doc Martens's boots
Tom Wolfe
Banksy
Miles Davis
A steam-punk engineers' vest
Willie Nelson
Amazon Alexa
Doc Martens's boots
Tom Wolfe
Banksy