Uluru is an inselberg, a geological term that literally means an island mountain. Seeing the huge rock rise up from the flat surrounding land, the term makes perfect sense.

Is Ayers Rock considered a mountain?

Uluru is an inselberg, meaning "island mountain".

Is Uluru a mountain or a hill?

Uluru is the world's largest monolith, or, more accurately, an 'inselberg' — an isolated mountain or hill rising from a plain in a hot and dry region.