Definition of fingerprint
1 : the impression of a fingertip on any surface also : an ink impression of the lines upon the fingertip taken for the purpose of identification
2 : something that identifies: such as
a : a trait, trace, or characteristic revealing origin or responsibility
b : analytical evidence (such as a spectrogram) that characterizes an object or substance especially : the chromatogram or electrophoretogram obtained by cleaving a protein by enzymatic action and subjecting the resulting collection of peptides to two-dimensional chromatography or electrophoresis
c : the base-pair pattern in an individual's DNA obtained by DNA fingerprinting
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