Definition of fingerprints:
(n) :
The natural pattern of ridges on the tips of human fingers, unique to each individual.
(n) :
The patterns left on surfaces where uncovered fingertips have touched, especially as used to identify the person who touched the surface.
(n) :
(by extension) A unique combination of features that serves as an identification of something.
(n) :
(figurative) A trace that gives evidence of someone's involvement.
(v) :
(transitive) To take somebody's fingerprints.
(n) :
(cryptography) A unique identification for a public key in asymmetric cryptography.