Definition of populousness in US English:

populousness

noun

  • See populous

    • ‘The bewildering populousness of Friday night's party was in stark contrast to the scenes on Saturday morning at the rowing, where nobody seemed to have turned up who wasn't either a rower or Tony Blair.’
    • ‘Moreover, planters like Long contradicted themselves in blaming polygamy for low fertility while citing the ‘populousness’ of West Africa, where the practice ‘universally prevailed’.’
    • ‘One was concerned with the relative populousness of the ancient and modern worlds and the other seven were contributions to what is now called economics.’