1. in a way that is unified, uniform, or unchanging; as a single, indivisible whole
Usage: often used to describe rigid or inflexible systems, organizations, or structures
2. in a manner resembling or characteristic of a monolith; in a massive, imposing, or impersonal way
Usage: often implies lack of individual variation or personal touch

Examples

• The corporation operated monolithically, with all decisions made at the top and enforced uniformly across every branch.
• The government's monolithically centralized approach left little room for local innovation.
• The building stood monolithically against the skyline, a single imposing structure.
• The team moved monolithically toward the goal, with no deviation from the original plan.
• Unlike smaller competitors, the large firm responded monolithically to market changes.
• The culture was monolithically conservative, resisting any form of modernization.