Definition of watermark noun from the Oxford Advanced American Dictionary

 

watermark

 noun
noun
NAmE//ˈwɔt̮ərˌmɑrk//
 
, NAmE//ˈwɑt̮ərˌmɑrk//
 
 
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a symbol or design in some types of paper that can be seen when the paper is held against the light see also high-water mark, low-water mark
See the Oxford Advanced Learner's Dictionary entry: watermark