1. things that serve to identify or distinguish someone or something
Usage: plural of identifier
2. unique codes, names, or symbols used in computing to reference data or objects
Usage: computing; programming

Examples

• The police collected several identifiers from the crime scene.
• Your social security number and driver’s license are important personal identifiers.
• The programmer used clear identifiers for all the variables in the code.
• Each product has multiple identifiers including a barcode and serial number.
• The database requires unique identifiers for each customer record.
• Biometric identifiers like fingerprints are becoming more common for security.
• The system crashed because two functions had identical identifiers.