A more thorough explanation:

Definition: Fingerprint is the unique pattern of lines on the tip of a human finger. No two fingerprints are the same.

Examples:

• The detective found several fingerprints on the knife.
• After the arrest, the police took the suspect's fingerprints during the booking procedure.

These examples illustrate how fingerprints are used in criminal investigations. The unique pattern of lines on a person's fingertip can be used to identify them and link them to a crime scene. Fingerprinting is a common practice in law enforcement to help solve crimes and bring criminals to justice.