watermark /ˈwɔːtəmɑːk/noun 5verb 2forms 3 noun5 •A translucent design impressed on the surface of paper and visible when the paper is held to the light. •A logo superimposed on a digital image, a television broadcast, etc. •A value stored in a datafile to ensure its integrity, so that if the file's contents are changed then the watermark will no longer match the contents. •A mark indicating the level to which water has risen. •A default hint caption displayed in a text box prior to the user inputting any text. verb2 •To mark paper with a watermark. •To mark a datafile with a digital watermark. formswatermarked · watermarking · watermarks