overmount

Century Dictionary and Cyclopedia

1. To surmount; go higher than.
2. n. In framing or mounting pictures to be covered with glass, a piece of stiff paper or board cut to correspond with the margin of the engraving or picture to be mounted, and laid upon the picture to separate its surface from the glass in the frame; a mat.

Wiktionary

1. v. transitive To mount over; to go higher than; to rise above.

GNU Webster's 1913

1. v. To mount over; to go higher than; to rise above.