monolith

noun

• 1a large single upright block of stone, especially one shaped into or serving as a pillar or monument: we passed Stonehenge, the strange stone monoliths silhouetted against the horizon
• a very large and characterless building:the 72-storey monolith overlooking the waterfront
• a large block of concrete sunk in water, e.g. in the building of a dock.

• 2a large, impersonal political, corporate, or social structure regarded as indivisible and slow to change:independent voices have been crowded out by the media monoliths