What does it mean to be a Visionary Architect?

The architect Zaha Hadid is often referred to as a visionary, but
what exactly does that mean? Judging from the retrospective currently
on view at the Guggenheim Museum in New York (through Oct. 25), the
title has a lot to do with the source of her inspiration. The show,
which proceeds in a linear fashion along the spiral, begins with
paintings, continues with paper reliefs, models, and architectural
renderings, and concludes with photographs of finished buildings.