noun
monolith
MAH-nuh-lith/ˈmɑːnəlɪθ/
A massive single block of stone.
A granite monolith stands at the entrance to the park.

Etymology
Literally “one stone,” a monolith was a monument consisting of a single large block. That image of an undivided mass supports its extended use for a massive structure treated as one uniform whole.
In context
the Quarry contains a number of very large blocks that were never transported this monolith approximately 69 ft long and weighing around 1,000 tons has never been moved from where it was originally cut
More examples
- Workers use a crane to lift the heavy monolith.
- The ancient monolith bears an inscription on one side.
- Three massive monoliths stand in a row beside the trail.
Forms
monolith · monoliths
monolithic adjective — Made from a single block of stone.
Similar words
- boulder
- A large natural rock, not necessarily shaped or placed.
- megalith
- A large stone used in a prehistoric monument or structure.