trans ‧ at ‧ lan ‧ tic /ˌtrænzətˈlæntɪk◂/ BrE AmE adjective [only before noun]
1 . crossing the Atlantic Ocean:
transatlantic flights
2 . involving countries on both sides of the Atlantic Ocean:
a transatlantic agreement
3 . on the other side of the Atlantic Ocean:
one of America’s transatlantic military bases