premise: The Burj Khalifa is in disuse.
hypothesis: The Burj Khalifa ( برج خليفة , Arabic for `` Khalifa Tower '' ; pronounced [ langˈbɝdʒ_kə ` li : fə ] ) , known as the Burj Dubai before its inauguration , is a megatall skyscraper in Dubai , United Arab Emirates . With a total height of 829.8 m including the antenna and a roof height of 828 m , the Burj Khalifa is currently the tallest structure in the world since topping out in late 2008 . The building broke numerous height records , including its designation as the tallest tower in the world . Critical reception to Burj Khalifa has been generally positive , and the building has received many awards . The tallest building in the world is Burj Khalifa .