Definition of Identifier

someone or something that classifies or singles out something else

Examples of Identifier in a sentence

Sally was placed in the witness relocation program because “Blue Eyes” McKenzie knew she was his identifier as the person who committed the murder.  🔊

Sometimes gardeners look at the tags stuck in the ground next to the plants because this identifier will reveal the plant’s name and information.  🔊

The identifier of the pills in the bottle could be seen by the patient by looking at the label outside of the bottle.  🔊

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