Meanings
colloquialcool (in its informal senses)
Die Musik war echt cool.The music was very cool.
colloquialcool, calm, easy-going
Als Trainer muss mann ziemlich cool sein.As a trainer you have to be quite easy-going.
Examples
GermanEnglish
Toms Mutter ist cool.Tom's mom is cool.
Planetarien sind cool.Planetariums are cool.