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fingerprint
This term evokes a sense of absolute uniqueness and forensic precision. In its literal sense, it refers to the biological markers used in criminal investigations to link a specific individual to a physical location or object. When used figuratively or technically, it describes a distinctive signature or a digital hash that serves as a proxy for identity. It implies a level of specificity that makes an entity distinguishable from all others in a large set, whether that be a writer's style or a computer's hardware configuration.
Meanings
The unique pattern of ridges and furrows on the tip of a human finger, used for identification.
"The police found a clear fingerprint on the glass."
A unique characteristic or identifying mark that allows something to be recognized or distinguished from others.
"The author's prose has a distinct stylistic fingerprint that makes her work instantly recognizable."
A digital identifier or a hash value used in computing to uniquely identify a piece of data or a device.
"The system uses a hardware fingerprint to ensure that only authorized devices can access the network."