An English surname from Old French. / A unisex given name transferred from the surname. / (cryptography, computer security) The malicious party in examples of threat scenarios. See Alice and Bob.

(gastroenterology, pathology) Gastoesophageal laceration, with bleeding from tears in the mucosa at the junction of the stomach and esophagus, sometimes caused by severe alcoholism.

(gastoenterology, pathology) A tear in the tissue of the lower esophagus.