The length of time a material, substance, product, or reagent can be stored under specified environmental conditions and continue to meet all applicable specification requirements and/or remain suitable for its intended function.
The length of time that a good can be stored while still remaining useful enough to sell. Important for both perishable goods and goods that may become obsolete for reasons of technology or fashion. Relevant for international trade when, for example, customs procedures cause delays.
The maximum time an item may be stored before use.