1. warm quilts or comforters filled with soft feathers from eider ducks
2. the soft, warm feathers from eider ducks used as filling for bedding

Examples

• The hotel provided luxurious eiderdowns for the cold winter nights.
• She collected vintage eiderdowns from estate sales.
• The eiderdowns kept us warm during the mountain camping trip.
• Traditional eiderdowns are filled with the finest duck feathers.
• My grandmother's eiderdowns were passed down through generations.
• The expensive eiderdowns were worth the investment for better sleep.