what is ptolemy
The noun PTOLEMY has 2 senses: 1. Alexandrian astronomer who proposed a geocentric system of astronomy that was undisputed until Copernicus (2nd century AD) 2. an ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra. Familiarity information: PTOLEMY used as a noun is rare.