expansivity   (TTS Sound)

The noun expansivity has 3 senses

• coefficient of expansion, expansivity -- (the fractional change in length or area or volume per unit change in temperature at a given constant pressure)


• expansiveness, expansivity -- (a quality characterized by magnificence of scale or the tendency to expand; "the expansiveness of their extravagant life style was soon curtailed")


• effusiveness, expansiveness, expansivity -- (a friendly open trait of a talkative person)