Dictionary
grey area
a category of law which has not been decided or which no source of law addresses
The compounds are not illegal and it's not illegal to sell bath salts, it's a very grey area.
American English
- gray area
Phrase Bank
- Since the court decision, downloading music for free from Napster is no longer a grey area of the law.
- There is a fairly grey area lying in between what can be termed public and what can be termed private.