Land that has never been explored or developed. / (idiomatic) By extension, ideas or concepts or activities that have not yet been tried, explored or developed.

a territory placed under the administration of a state by the United Nations

(historical) A former territory of the United States that consisted of the future states of Ohio, Indiana, Illinois, Michigan, and Wisconsin, plus part of Minnesota. It existed from 1787 to 1803.

An administrative division of India that is ruled directly by the federal government, as opposed to a state or province.

Our models of the world, and our sensations of the world, are not the true world.

(US, rail transport) A section of railroad track not controlled by signals.

A federal territory in north-central Pakistan in which the country's capital Islamabad is located.

(formal) Delhi

A federal territory of Nigeria centred on the capital Abuja, in the North Central geopolitical zone.

A Germanic microstate that existed from 1920 to 1935.