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Noun: expansiveness  ik'span-siv-nus or ek'span-siv-nus
  1. A quality characterized by magnificence of scale or the tendency to expand
    "the expansiveness of their extravagant life style was soon curtailed";
    - expansivity
  2. A friendly open trait of a talkative person
    - effusiveness, expansivity

Type of: communicativeness, grandness, impressiveness, magnificence, richness