There's certainly a spectrum, but you can have huge clusters of even the most monolithic monolith.

The real semantic fun begins when you have monolithic codebase/deployments that could do everything, but each instance gets assigned a specialized role it serves to its peers _ (I think I've seen someonevdescribing that approach somewhere). I'd consider that micro if there are more than a handful of "roles", perhaps with some qualifier, but it would hopefully be easy to agree than no description is entirely wrong.