1. plural of nixie: water spirits or sprites in Germanic folklore, typically depicted as beautiful women who lure men to their deaths
Usage: mythology; folklore
2. plural of nixie: pieces of mail that cannot be delivered due to incorrect or incomplete addresses
Usage: postal service terminology

Examples

• The old German tales spoke of nixies who sang from the riverbanks.
• Folklore describes nixies as enchanting but dangerous water spirits.
• The postal worker sorted through a pile of nixies returned from various routes.
• Letters with smudged addresses often end up as nixies.
• The mythology class studied various water spirits including nixies and mermaids.
• Mail processing centers handle thousands of nixies each day.