thumbprint
- n fingerprint made by the thumb (especially by the pad of the thumb)
- After the crackdown, he put his thumbprint on a police document promising he would never again practice, but he was lying.
- If the bank later discovers that the check is forged, the thumbprint is forwarded to Identiseal headquarters for filing, and then to the police in the city where the check was .
- And though the thumbprint cookies I made from it got rave reviews, it was mildly annoying to have to tap the screen every few minutes to get it out of power-save mode while I mixed .