a mark made by a finger; esp. a mark left upon a surface where a dirty or greasy finger has touched it; (formerly also) spec. = fingerprint, n. 1b…

An impression or mark made on a surface by the tip of a person's finger, esp. one which is dirty or greasy; a finger mark.

an impression or mark left by a finger; = fingerprint, n. 1.

the impression or mark of the inner surface of the top joint of the thumb, made with ink or otherwise upon a receptive surface; also figurative.

colloquial. = fingerprint, n.

a fingerprint which is invisible or barely visible to the naked eye (see sense A. 7b); = B.

U.S. Criminology. A fingerprint, esp. an impression of a fingerprint taken from an object as part of a criminal investigation. See sense additions…