| Noun | 1. | Hiroshima - a port city on the southwestern coast of Honshu in Japan; on August 6, 1945 Hiroshima was almost completely destroyed by the first atomic bomb dropped on a populated areacity, metropolis, urban center - a large and densely populated urban area; may include several independent administrative districts; "Ancient Troy was a great city" port - a place (seaport or airport) where people and merchandise can enter or leave a country Hondo, Honshu - the central and largest of the four main islands of Japan; between the Sea of Japan and the Pacific Ocean; regarded as the Japanese mainland | |