PatrasPronunciation: /pəˈtras, ˈpatrəs/Definition of Patras an industrial port in the NW Peloponnese, on the Gulf of Patras; population 167,400 (est. 2009). It was the site in 1821 of the outbreak of the Greek war of independence. Greek name Pátrai /ˈpatrɛ/. Patras in other Oxford dictionaries Definition of Patras in the US English dictionary