「チル」な曲は、人それぞれで、また、時代によって変化するので、その定義はできないです。
私にとって「チル」な曲のひとつ↓です。
Rick Derringer の、Teenage Queen。
血圧が安定して、やさしい気持ちになります。
I remember searchin' for a lonely gravel road
I was nervous that night 'cause beside me was the girl I loved
We had planned this moment and it was gonna be a dream come true
We were finally alone, was a lotta things we wanted to do Ah-hoo
Now, the road was gravel but it wasn't wide enough to park
I was burnin' inside, drivin' faster right into the dark
You might have guessed the outcome, the end that wasn't in our dream
Wasn't much of a wreck but enough to take my teenage queen
Ah-hoo Oh,
I loved her so
I just can't figure out where she did go
Oh, I miss her so
My mind, it still refuses to let her go
She had eyes that sparkled, shooting life into your heart
With a wink of her eye she could always make the poundin' start
But it only took one moment to take that spark away
Can't forget that night, have it with me on my dyin' day
Ah-hoo
Oh, I loved her so
I just can't figure out where she did go
Oh, I miss her so
My mind, it still refuses to let her go