Dictionary

thumbprint

noun thumb·print \ˈthəm-ˌprint\

: the pattern of marks made by pressing your thumb on a surface : a fingerprint made by a thumb

Full Definition of THUMBPRINT

1
:  an impression made by the thumb; especially :  a print made by the inside of the first joint
2
:  something that identifies; especially :  fingerprint 2a

Examples of THUMBPRINT

  1. He left a dirty thumbprint on the page.

First Known Use of THUMBPRINT

1900

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