ArgosPronunciation: /ˈɑːgɒs/Definition of Argos a city in the NE Peloponnese of Greece; population 23,600 (est. 2009). One of the oldest cities of ancient Greece, it dominated the Peloponnese and the western Aegean in the 7th century bc. Argos in other Oxford dictionaries Definition of Argos in the US English dictionary