Pallet is a busy noun, but it’s mainly a slab or framework of wood used for carrying things. The most common type of pallet is the kind used to move cargo.
After the earthquake in Haiti, hundreds of pallets of food, medicine, and bottles of fresh water were delivered to Port-au-Prince by air. Many pallets are designed with slots at the bottom to accept a forklift's forks. If you're a talented carpenter, you might be able to turn the wood from a used pallet into a table, a chest of drawers, a tree house, or perhaps a little bed to lie down on after all that hard work.