grey
adjective [ before noun ]
UK ( US gray) uk/ɡreɪ/ us COMMERCE, ECONOMICS
used to describe an unofficial but not illegal system in which products are bought in a foreign country and sold more cheaply than in the manufacturer's usual distribution system:
Grey trade goods
Compare
parallel
MARKETING
used to describe people over about 50, considered as a group:
The grey generation are turning their backs on employment and starting their own businesses.