1. In a wasteful manner
   "the United States, up to the 1920s, used fuel lavishly, mainly because it was so cheap"
   - extravagantly 
2. In a rich and lavish manner
   "lavishly decorated"
   - richly, extravagantly

See also: lavish

• Bill Haley
• Bill Mauldin
• bill of attainder
• bill of entry
• bill of exchange
• bill of fare
• bill of goods
• bill of health
• bill of indictment
• bill of lading
• bill of Particulars
• bill of review
• Bill of Rights
• bill of sale
• bill poster
• Bill Russell
• bill sticker
• bill-me order
• billable
• billabong
• billboard
• billed
• billet
• billet doux
• billfish