| Noun | 1. | Vatican City - the capital of the State of the Vatican Citycity, metropolis, urban center - a large and densely populated urban area; may include several independent administrative districts; "Ancient Troy was a great city" Holy See, State of the Vatican City, The Holy See - the smallest sovereign state in the world; the see of the Pope (as the Bishop of Rome); home of the Pope and the central administration of the Roman Catholic Church; achieved independence from Italy in 1929 | |