Linen is a type of fabric that's sturdy, cool, and absorbent. If you're going to a summer wedding, you should consider wearing a white linen suit. If you're going on a job interview, it's probably not such a great idea.
Linen is frequently used in summery dresses and shirts, curtains, bags, pillowcases and sheets, towels. and tablecloths. It's heavy and substantial but stays breathable and fresh when you wear it on a hot day. Linens is sometimes used to mean "bedding or towels," or the things you'd keep in a linen closet. Linen comes from the Old English word linin, "made of flax," from lin, "flax fibers or linen thread."