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English definition of “watermark”

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watermark

noun [C] uk   /ˈwɔː.tə.mɑːk/ us    /ˈwɑː.t̬ɚ.mɑːrk/

watermark noun [C] (PAPER)

a mark made in some types of paper during its production that can only be seen if it is held against the light

watermark noun [C] (RIVER/SEA)

a mark showing the highest or lowest level that a river or the sea reaches
(Definition of watermark from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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