Horizontal surface at window bottom.

U.S. Army base, artillery training.

A sill plate or sole plate in construction and architecture is the bottom horizontal member of a wall or building to which vertical members are attached.

The Whin Sill or Great Whin Sill is a tabular layer of the igneous rock dolerite in County Durham, Northumberland and Cumbria in the northeast of England.

Outdoor faucet for hose attachment.

one of the fourteeners of the Sierra Nevada in California.

Horizontal layer of bricks, stones.

Base frame member of structure.

Support structure in masonry construction.

Judith Lynne Sill (October 7, 1944 – November 23, 1979) was an American folk artist and singer-songwriter.

the sill separating the Mediterranean Sea and the Atlantic Ocean.