Lean-to

Lean´-to`

a.	1.	(Arch.) Having only one slope or pitch; - said of a roof.
n.	1.	(Arch.) A shed or slight building placed against the wall of a larger structure and having a single-pitched roof; - called also penthouse, and to-fall. The outer circuit was covered as a lean-to, all round this inner apartment. - De Foe.
	2.	A crude, usually temporary shelter comprising a lean-to roof braced against any convenient support, as a wall, a tree or a pole. The roof may extend all the way to the ground.

Noun

lean-to - rough shelter whose roof has only one slope