/waw"teuhr mahrk', wot"euhr-/ , n.
1. a mark indicating the height to which water rises or has risen, as in a river or inlet.
2. See water line (def. 5).
3. a figure or design impressed in some paper during manufacture, visible when the paper is held to the light.
v.t.
4. to mark (paper) with a watermark.
5. to impress (a design, pattern, etc.), as a watermark.
[ 1625-35; WATER + MARK 1 ]