- 1. A single, tall block of stone, especially one shaped like or into a column or pillar.
2. Anything resembling one of these in its uniformity, immovability or massiveness.
3. civil engineering.
- A large uniform mass of concrete or similar material.
- Relating to or like a monolith.
- Said of an organization, etc: large, unchanging and difficult to deal with.
- Thesaurus: colossal, huge, gigantic, monumental, vast; solid, undifferentiated, unvaried.