Weightiness

noun

1. The state or quality of being weighty; ponderousness; heaviness, literally or figuratively; solidity; force; importance.
2. The quality or state of being weighty; weight; force; importance; impressiveness.
3. The quality of being weighty
4. the relative importance granted to something

   "the progression implied an increasing weightiness of the items listed"

5. the property of being comparatively great in weight