an ancient territory in W central Italy, in modern Lazio, on the Tyrrhenian Sea: inhabited by the Latin people from the 10th century bc until dominated by Rome (4th century bc)
Italian name: Lazio
Latium in American English
(ˈleɪʃəm; ˈleɪʃiəm)
1.
region of central Italy, on the Tyrrhenian Sea: 6,644 sq mi (17,208 sq km); pop. 5,140,000; chief city, Rome: It. name Lazio
2.
ancient country in the part of this region southeast of Rome