Most of the systems cut across traditional political boundaries and some are small, serving only one city.

But it also has the power to speak across boundaries, giving a common language to a diverse community.

Important debates about how best to study politics cut across boundaries.

"He has an ability to communicate across age, economic, religious and racial boundaries."

Scholars must be free to work with one another across national boundaries.

I wanted to do something like this, a test that would reach across boundaries.

For many, these cut across social, emotional and health boundaries.

In my view, though, we also need uniform standards of training and professional development, as aid is often required across national boundaries.

It is about helping small companies trade across national boundaries.

However, free movement is a prerequisite for people to be able to meet across national boundaries.