A 3'x4' x 6" high wooden or sometimes plastic platform upon which to stack freight to aid in material handling. The only way to move it, when loaded, is with a forklift or pallet jack.
http://conveyor-chains.net/2011/05/27/pallet/
See also the homophone palette.
http://conveyor-chains.net/2011/05/27/pallet/
See also the homophone palette.