English version

high watermark

From Longman Dictionary of Contemporary Englishhigh watermarkhigh watermarkespecially American English the high watermark of a particular process is its most successful time or achievement syn high pointhigh watermark of Reagan’s presidency may prove to have been the high watermark of the US-Israeli alliance. watermark
Examples from the Corpus
watermark ofPenal Policy in a Changing Society stands as the high watermark of what later became known as the treatment model.
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