The phrase "shorter lifespan" refers to a shorter duration or time period during which something can function, operate, or be used effectively before it becomes outdated, worn-out, or obsolete. It is often associated with products that have a limited shelf life and must be replaced or discarded after reaching the end of their usefulness. The phrase can also refer to living organisms such as animals or plants which have a shorter lifespan than others in their species. In summary, "shorter lifespan" means something has a reduced timeframe before it needs to be disposed of or replaced due to its limited functionality.