Meaning of underlay

Definition of underlay

(noun) a pad placed under a carpet
(verb) raise or support (the level of printing) by inserting a piece of paper or cardboard under the type; "underlay the plate"
put (something) under or beneath; "They underlaid the shingles with roofing paper"
provide with a base, support, lining, or backing; "underlay the boards with joists"

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