noun
Refers to a single large block of stone, or metaphorically to something massive and uniform. Common in sci-fi contexts (e.g., 2001: A Space Odyssey).
その遺跡には巨大なモノリスが立っていた。
A huge monolith stood at the ruins.
映画『2001年宇宙の旅』に登場する黒いモノリスは有名だ。
The black monolith that appears in the movie '2001: A Space Odyssey' is famous.