Since the 1990s, China has been involved in negotiations to resolve its disputed land borders, including a disputed border with India and an undefined border with Bhutan.

The Duchy occupied the Attic peninsula and extended partially into Thessaly, sharing an undefined border with Thessalonica and then Epirus.

Thirty-eight miles south of In Amenas lies the Tiguentourine Erg, which edges out at its southern end toward an undefined border with Libya.

Other territorial disputes include islands in the East and South China Seas, and undefined or disputed borders with India and North Korea.

The extensive Liwa Oasis is in the south near the undefined border with Saudi Arabia.

The source of the river had been unknown until then, resulting in an undefined border between the United States and British North America.

The problem of the condominium's undefined borders was a greater concern.

Writers, like many who work and live in the same place, are plagued by the undefined borders between our professional and personal lives.

I am talking about the problems of citizenship, sharing debt and oil revenues and the difficult matter of undefined borders.

With its mostly undefined borders, it was one of the largest seigneuries.