carbon copy
noun [ C ]
ukus WORKPLACE (also carbon)
a copy of a document, made with carbon paper:
When credit cards were first introduced, retailers had to run the card through a hand-held machine that created a carbon copy.
a person or thing that is very similar to or exactly like another person or thing:
The market trend we are following is almost a carbon copy of what's taken place in the US, Canada, and Australia.
See also
cc