1. impressions or marks made by the thumb, especially the distinctive pattern of ridges used for identification

Examples

• The police collected thumbprints from the crime scene.
• All employees must provide thumbprints for the security system.
• The detective compared the thumbprints on the glass to those in the database.
• Her thumbprints were clearly visible on the clay pottery.
• The document required thumbprints as proof of identity.
• Digital scanners can quickly read thumbprints for access control.