- underlay⇄noun 1. something laid beneath.
2. (Printing.) a piece of paper, or a sheet with pieces pasted on it, laid under type to bring it to the proper height for printing. - underlay⇄underlay (1), verb, -laid,-laying,noun.
- underlay⇄underlay (2), verb.
the past tense of underlie. - underlay⇄v.t. 1. to lay or place (one thing) under another.
2. to provide with something laid underneath; raise or support with something laid underneath.
3. to coat or cover the bottom of.