A pad placed under a carpet.

synonyms: carpet pad, rug pad, underlayment.

Roget 591: printing; block printing, type-printing; plate printing etc. 558 (engraving); the press etc. (publication) 531; composition.    print, letterpress, text; context, note, page, column.    typography; stereotype, electrotype, aprotype^†; type, black letter, font, fount; pi, pie; capitals etc. (letters) 561; brevier^†, bourgeois, pica boldface &c., capitals, caps.   , catchword; composing-frame, composing room, composing rule, composing stand, composing stick; italics, justification, linotype, live matter, logotype; lower case, upper case; make-up, matrix, matter, monotype^†; [point system], 4-1/2 point, 5 point, 5-1/2 point, 6 point, 7 point, 8 point, press room, press work; reglet^†, roman; running head, running title; scale, serif, shank, sheet work, shoulder, signature, slug, underlay.    folio etc. (book) 593; copy, impression, pull, proof, revise; author's proof, galley proof, press proof; press revise.    printer, compositor, reader; printer's devil copyholder.    ... show more

Raise or support (the level of printing) by inserting a piece of paper or cardboard under the type.

Put (something) under or beneath.

Provide with a base, support, lining, or backing.