underlay
Definitions
Construction
- A material, such as asphaltic felt, that isolates a roof covering from the deck. See also underlayment and carpet underlayment.
Publishing
- noun card used to raise the height of a block or plate
- verb to raise the height of a printing plate by putting something such as a piece of card under it
Real Estate
- noun a layer of cushioning and insulating material put down on a floor before a carpet is laid
