1. a mark indicating the height to which water rises or has risen, as in a river or inlet.
2. water line (def 5).
3. a figure or design impressed in some paper during manufacture, visible when the paper is held to the light. verb (used with object)
4. to mark (paper) with a watermark.
5. to impress (a design, pattern, etc.), as a watermark.
"technologies can be watermarking."
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