watermark
water|mark /w'ɔːtərmɑːrk/ (watermarks)
[N-COUNT]
A watermark is a design which is put into paper when it is made, and which you can only see if you hold the paper up to the light. Banknotes often have a watermark, to make them harder to copy illegally.
see also high-water mark
[N-COUNT]
A watermark is a design which is put into paper when it is made, and which you can only see if you hold the paper up to the light. Banknotes often have a watermark, to make them harder to copy illegally.
see also high-water mark