A boxy style of domestic architecture with four rooms to a floor, one of which is usually a stair hall.
A four-square cipher.
Solid, robust.
Pertaining to the International Church of the Foursquare Gospel.
Having four equal sides; square.
Pertaining to a four-square cipher.
In the shape of a square; at right angles.
In a direct, straightforward and honest manner.
Firmly and solidly.