Ineke | Heerkens

grey- a-re-a: [grey air-ee-uh] an intermediate area; a topic that is not clearly one thing or the other. A grey area is a term for a border in-between two or more things that is unclearly defined, a border that is hard to define or even impossible to define, or a definition where the distinction border tends to move; something that is open to interpretation...

Wordnet Princeton Online