"The terms are supposed to define what are otherwise very nebulous concepts," he said.

Honor among men was a nebulous concept, often continually redefined.

To them, the Federation was a nebulous concept, especially now that it had seemingly deserted them.

Social isolation is a very nebulous concept to attempt to quantify.

Social support remains, however, a rather nebulous concept to define and measure in social surveys.

Ultimately, the best defense may hinge not on logic or law but on more nebulous concepts like experience and common sense.

What room for manoeuvre there was consisted in verbal manipulations behind which lay nebulous concepts.

This bunch of sources related one with the others, but not strictly linked, leads to a nebulous and abstractive concept, hard to explain clearly.

The cyber domain, for instance, presents an extremely nebulous concept.

There is no doubt that the old rating system was based on the nebulous concept of a fair market rent.