also: ジンス
I wore my new jeans today.
denim; jean (fabric)
Refers to the denim fabric itself, not necessarily a finished garment.
This bag is made of denim fabric.
I wore my favorite jeans out today.
My jeans got torn at the knee.
They were too long, so I had the jeans hemmed.
ripped jeans; distressed jeans
jean jacket; denim jacket