Ostia

UK: /ˈɒstɪə/ US: (os′tē ə; It. ô′styä)

WordReference Random House Unabridged Dictionary of American English © 2026

Os•ti•a  (os′tē ə; It. ô′styä), n. 

1. Place Names a town in central Italy, SW of Rome: ruins from 4th centuryb.c.;
   site of ancient port of Rome.

Collins Concise English Dictionary © HarperCollins Publishers::

Ostia / ˈɒstɪə/ noun

1. an ancient town in W central Italy, originally at the mouth of the Tiber but now about 6 km (4 miles) inland: served as the port of ancient Rome; harbours built by Claudius and Trajan; ruins excavated since 1854