Lebanon UK /ˈlɛbənən/US /ˈlɛbənɑn/ noun2 •A country in West Asia in the Middle East. Official name: Lebanese Republic. Capital: Beirut. Also (especially formerly) known as "the Lebanon"."He does a trip from Jiddah up to the Lebanon and now he's extending it as far as Marseilles." — 1958 •A mountain range in the country of Lebanon, West Asia; in full, Mount Lebanon. formsLebanons