Main Entry:

¹wa·ter·mark

Pronunciation:

\ˈwȯ-tər-ˌmärk, ˈwä-\

Function:

noun

Date:

1640

1: a mark indicating the height to which water has risen2: a marking in paper resulting from differences in thickness usually produced by pressure of a projecting design in the mold or on a processing roll and visible when the paper is held up to the light ; also : the design of or the metal pattern producing the marking