Pallas Syllabification: (Pal·las)Pronunciation: /ˈpaləs/Definition of Pallas 1 Greek Mythology (also Pallas Athene)one of the names (of unknown meaning) of Athena. 2 Astronomy an asteroid discovered in 1802. It is the second largest, with diameter of 325 miles (523 km). Pallas in other Oxford dictionaries Definition of Pallas in the British & World English dictionary