greatness Meaning, Definition & Usage

  1. noun the property possessed by something or someone of outstanding importance or eminence
    illustriousness.
  2. noun unusual largeness in size or extent or number
    grandness; immenseness; vastness; immensity; wideness; enormousness; sizeableness.

WordNet

Great"ness noun
Etymology
AS. greátnes.
Definitions
  1. The state, condition, or quality of being great; as, greatness of size, greatness of mind, power, etc.
  2. Pride; haughtiness. Obs.
    It is not of pride or greatness that he cometh not aboard your ships. Bacon.

Webster 1913