1. in a way that spends or uses too much money or resources; wastefully
2. in an extremely elaborate, luxurious, or impressive way
3. to an excessive or unreasonable degree

Examples

• She spent extravagantly on designer clothes and jewelry.
• The wedding was extravagantly decorated with thousands of flowers.
• He praised her extravagantly for her performance in the play.
• The mansion was extravagantly furnished with antiques and artwork.
• They lived extravagantly beyond their means for years.
• The restaurant was extravagantly expensive for what it offered.
• She gestured extravagantly while telling her story.