The Greek adjective agoraios (Ἀγοραῖος) derives from agora (the marketplace, public square), meaning "of or belonging to the marketplace" — whether referring to people who loiter there or to legal proceedings held in such public spaces. It appears in Acts 17:5 ("marketplace loafers") and Acts 19:38 ("the courts are open").
The agora — the Greek marketplace and civic center — was the beating heart of Greco-Roman public life. It was where commerce, politics, philosophy, and justice converged. Paul himself engaged in the agora of Athens, where "he reasoned in the synagogue with both Jews and God-fearing Greeks, as well as in the marketplace (agora) day by day" (Acts 17:17). The word agoraios in Acts 17:5 describes the mob raised against Paul as idle marketplace rabble — people without constructive purpose. In Acts 19:38, Demetrius the silversmith is reminded that the courts are open (agoraious — public hearings), signaling that legitimate grievances have legitimate channels. Paul's bold engagement in the agora is a model for gospel proclamation in the public square — Christianity is not merely private religion.