- a mark indicating the height to which water rises or has risen, as in a river or inlet.
- water line (def. 5).
- a figure or design impressed in some paper during manufacture, visible when the paper is held to the light.
- a small piece of code or identifiable data sequence embedded into a digital file, usually an image or an audio or video file, as a traceable marker of origin or ownership.
- to mark (paper or a digital file) with a watermark.
- to impress (a design, pattern, etc.), as a watermark.
- to place (a digital identifier) into a file.
- a distinguishing mark impressed on paper during manufacture, visible when the paper is held up to the light
- another word for water line (def. 1), water line (def. 2)
- to mark (paper) with a watermark
