A mark left on a surface by a person's fingertip. An image of the ridges on a person's fingertip made by putting ink on the fingertip and pressing it against a surface or by using a digital scanning device. A distinctive or identifying mark or characteristic:"We can, from his retelling [of the incident], with its particular fingerprint of stresses and omissions, learn a great deal about him"(Mark Slouka). See DNA profile. A chemical fingerprint.