1fin·ger·print 
/ˈfɪŋgɚˌprɪnt/ noun
plural fin·ger·prints /ˈfɪŋgɚˌprɪnt/ noun [count] 1 a : the mark that is made by pressing the tip of a finger on a surface
▪ Detectives found his fingerprints all over the gun. ▪ Everyone has a unique fingerprint. — sometimes used figuratively ▪ This project has his fingerprints all over it. [=it is obvious that he was very involved in this project]
b : a mark of this kind made in ink for the purpose of identifying a person — usually plural ▪ The police took her fingerprints for their files. —called also print 2 : something (such as genetic material) that can be used to identify a person
▪ a DNA fingerprint
▪ Detectives found his fingerprints all over the gun. ▪ Everyone has a unique fingerprint. — sometimes used figuratively ▪ This project has his fingerprints all over it. [=it is obvious that he was very involved in this project]
b : a mark of this kind made in ink for the purpose of identifying a person — usually plural ▪ The police took her fingerprints for their files. —called also print
▪ a DNA fingerprint
