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