noun

thumbprint

thumbprint

The police found a thumbprint on the glass.

The police found a thumbprint on the glass.

He used his thumbprint to unlock his phone.

He used his thumbprint to unlock his phone.

a thumbprint ((on sth.)) a mark left by a thumb on a surface The police found a thumbprint on the glass.

fingerprint, impression, mark

A compound word from 'thumb' and 'print'. It literally means the print made by a thumb.

Imagine pressing your thumb in ink and then onto paper. The mark it leaves is a 'thumbprint'.

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.