1. a name, number, or symbol that identifies someone or something
2. a sequence of characters used to identify a variable, function, or data structure in computer programming
Usage: computing

Examples

• Each student received a unique identifier for the exam.
• The product identifier helps track inventory.
• Your social security number serves as a personal identifier.
• The programmer chose a clear identifier for the variable.
• The barcode acts as an identifier for the item.
• Database records need a primary identifier.
• The flight identifier was displayed on the departure board.