Definition of “tidemark” - English Dictionary

british dictionary

“tidemark” in British English

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tidemarknoun [ C ]

uk /ˈtaɪd.mɑːk/ us /ˈtaɪd.mɑːrk/

also high water mark a line of waste left on a beach that marks the highest point the sea reaches

UK a dirty mark around a bath or sink, left by the water

(Definition of “tidemark” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)