lux·em·bourg·i·an I. adjective orlux·em·burg·i·an\| ̷ ̷ ̷ ̷| ̷ ̷gēən\ Usage: usually capitalized 1.: of, relating to, or characteristic of Luxembourg 2.: of, relating to, or characteristic of the people of Luxembourg II. noun (-s) Usage: capitalized : the Germanic speech of Luxembourg