overlay

n : a layer of boards applied to the studs and joists of a

building to strengthen it and serve as a foundation for a

weatherproof exterior [syn: {sheathing}, {overlayer}]

v 1: put something on top of something else; "cover the meat with

a lot of gravy" [syn: {cover}]

2: kill by lying on; "The sow overlay her piglets" [syn: {overlie}]