Watermark

(redirected from Spread Spectrum Watermarking)
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

Watermark

An image in a piece of paper that may be seen more clearly when it is held up to light. This is used in printing some money and passports to prevent counterfeiting. For example, if one holds a $20 American bill up to light, one would see a watermark of Andrew Jackson's face.