In a way that covers a wide area or has a wide range. The artist spoke expansively about his plans for the new mural, detailing every aspect of the design.
In a manner that is open, communicative, and willing to share thoughts or feelings. She smiled expansively as she recounted her adventures abroad, eager to share every detail with her friends.
In a generous or extravagant manner; liberally. He donated expansively to the charity, ensuring every project was fully funded.