greatness greatness /ˈgreɪtnəs/

noun

1. () The property possessed by something or someone of outstanding importance or eminence  ( illustriousness , greatness )
   the property possessed by something or someone of outstanding importance or eminence
     His accomplishments showcased his greatness and talent.
   His accomplishments showcased his greatness and talent.
   
2. Unusual largeness in size, extent or number  ( enormousness , grandness , greatness , immenseness , sizeableness , vastness , wideness , hugeness , vastitude , immensity )
   unusual largeness in size, extent or number