I've noticed a thread these days in which Elisabeth asked everyone to use only one word to describe what they are going for... here: http://youlookfab.com/welookfa.....-going-for

Angie's response was "Modern"
Not a single mention of "Trendy"
A few mentions of "Cool"

And it got me thinking what the main difference between Modern and Trendy is?

How does Cool fit with either of these descriptors from your point of view?
ETA: I'm only mentioning 'cool" because it does seem to appear with "trendy" often, although I think it to be more about the wearer's attitude than visible aspects of the outfit.