Tierra del Fuego UK /tɪˌɛːɹə dɛl ˈfwe(ɪ)ɡəʊ/US /tiˌɛɹə dɛl ˈfwe(ɪ)ɡoʊ/ noun3 •An island at the southern tip of South America, politically divided between Chile and Argentina; in full, Isla Grande de Tierra del Fuego. •A province of Argentina. Official name: Province of Tierra del Fuego, Antarctica and South Atlantic Islands. Capital: Ushuaia. •A province of Chile. Capital: Porvenir.