Meaning : The fractional change in length or area or volume per unit change in temperature at a given constant pressure.
Synonyms : coefficient of expansion
Meaning : A quality characterized by magnificence of scale or the tendency to expand.
Example :
The expansiveness of their extravagant life style was soon curtailed.
Synonyms : expansiveness
Meaning : A friendly open trait of a talkative person.
Synonyms : effusiveness, expansiveness
Expansivity meaning in Bengali (Bangla).