underlay meaning and definition

UNDERLAY noun

Definition of underlay (noun)

1. a pad placed under a carpet
   • synonyms: carpet pad, rug pad, underlayment

UNDERLAY verb

Definition of underlay (verb)

1. raise or support (the level of printing) by inserting a piece of paper or cardboard under the type
   • "underlay the plate"
2. put (something) under or beneath
   • "They underlaid the shingles with roofing paper"
3. provide with a base, support, lining, or backing
   • "underlay the boards with joists"