den·im 
(dĕnĭm)
(dĕnĭm)n.
1.
a. A coarse, twilled cotton fabric, often blue, traditionally used for overalls and work clothes and now used for jeans and casual wear.
b. denims Pants or another garment made of this fabric.
2. A similar but finer fabric used in draperies and upholstery.
[French (serge) de Nîmes, (serge) of Nîmes, after Nîmes, France.]
denimdenim jacket and pants