After reading these definitions for "cool" I realize many people think "cool" is something totally different than it was 30 years ago. Cool started out as unique, everlasting, and epic. Now it's thrashed around as Popular, rad, and such other mindless garb. You should talk to an older person about what cool was 30 years ago.
-Andee bought these cool pants from the thrift store, meaning noone else would be ever where it.
A word that started out to mean "hip," "excellent," etc., or other indefinable qualities, but has become vastly overused blanket exclamation of approval.