A thumbprint is a mark made by a person's thumb which shows the pattern of lines on its surface.
2. countable noun
If you say that something such as a project has someone's thumbprint on it, you mean that it has features that make it obvious that they have been involved with it.
It's got your thumbprint all over it.
His personal goal was to put 'his thumb print' on a program of changes.
thumbprint in British English
(ˈθʌmˌprɪnt)
noun
an impression of the upper part of the thumb, used esp for identification purposes
fingerprint
thumbprint in American English
(ˈθʌmˌprɪnt)
noun
1.
a fingerprint of the thumb
2.
fingerprint (sense 2)
Examples of 'thumbprint' in a sentence
thumbprint
The one positive thing that had come up was a partial thumbprint, not Ripley's, on her left mule.
Anthony Masters CASCADES - THE DAY OF THE DEAD (2002)
The same chemically treated plastic card on his desk with a thumbprint and the invitation: Test your stress level.