Definition of Tacna
city in southern Peru near the border with Chile population 242,451 ◆Tacna is in the region called Tacna–Aricaplay \-ä-ˈrē-kä\ that was occupied by Chile from 1884 to 1930 and is now divided between Chile and Peru.
Seen and Heard
What made you want to look up Tacna? Please tell us where you read or heard it (including the quote, if possible).