very friendly and willing to talk a lot:
Hauser was in an expansive mood.
very large in area, or using a lot of space:
She flung her arms out in an expansive gesture.
including a lot of information and using a lot of words:
an expansive definition
It was written in an expansive style.
relating to a business or economy becoming bigger or more successful:
expansive economic policies
—expansiveness noun [uncountable]