But such agreements have always included the Governor, so the two-party accord that leaves him out represents uncharted terrain.

An acutely gifted classicist, he came to the head of a business that was successful in traditional terms but now moved into uncharted terrain.

Legal experts said the case was venturing into uncharted terrain.

This was unknown, largely uncharted terrain; no one had ever mapped it in fine detail.

This is largely uncharted terrain, but there's little reason to think so.

But not every Internet company is operating in uncharted terrain.

In restricting the news media, Judge Ito has entered largely uncharted terrain.

But the link between the brain and the polis is still uncharted terrain.

That means, as policymakers and institutions, we are still navigating our way through uncharted terrain.

It means traversing uncharted terrain, as parents and children rewrite the rules of family living.