A suitcase is a piece of luggage that usually has a handle. If you're going on a week-long vacation, you should probably pack a suitcase to bring with you. Don't forget your toothbrush!
If your suitcase is large enough, you'll have to check it when you fly on an airplane — you can carry only small suitcases into the cabin of the plane. These days most suitcases have wheels so you can roll them along behind you as you walk through a bus station or down the sidewalk. The earliest suitcases were sewn from wool, linen, or leather, often covering a wooden frame. Today, most suitcases are made of nylon or lightweight metal.