Prod'i·gal·ly adverb In a prodigal manner; with profusion of expense; extravagantly; wasteful; profusely; lavishly; as, an estate prodigally dissipated. « Nature not bounteous now, but lavish grows; Our paths with flowers she prodigally strows.» Dryden. Found on http://www.encyclo.co.uk/webster/P/167