expansivity

Noun expansivity has 3 senses

• expansivity(n = noun.quantity) coefficient of expansion - the fractional change in length or area or volume per unit change in temperature at a given constant pressure;
is a kind of coefficient

• expansivity(n = noun.attribute) expansiveness - a quality characterized by magnificence of scale or the tendency to expand; "the expansiveness of their extravagant life style was soon curtailed"
is a kind of grandness, impressiveness, magnificence, richness
Derived form adjective expansive₂

• expansivity(n = noun.attribute) effusiveness, expansiveness - a friendly open trait of a talkative person;
is a kind of communicativeness
Derived form adjective expansive₄