i.e., "the market of Appius" ( Acts 28:15 , RSV), a town on the road, the "Appian Way," from Rome to Brundusium. It was 43 miles from Rome. Here Paul was met by some Roman Christians on his way to the capital. It was natural that they should halt here and wait for him, because from this place there were two ways by which travellers might journey to Rome.
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition,
published by Thomas Nelson, 1897. Public Domain, copy freely.
[S] indicates this entry was also found in Smith's Bible Dictionary
Bibliography InformationEaston, Matthew George. "Entry for Appii Forum". "Easton's Bible Dictionary".