A piano with a horizontal frame and an oblong case.

(construction) A large carpenter's square.

Alternative form of center square

A tool used to find the center of a circle, consisting of two perpendicular straight-edges, both placed tangent to the circular piece, and a third straight-edge which bisects the angle between the other two.

Alternative form of square shooter

(idiomatic) A person who is fair, trustworthy, or forthright; a person who bargains or transacts business in a fair, honest manner.

Alternative form of squarefree

A piece of square fabric produced by crocheting in rounds from the centre outward.

plural of square wave

A tool used to measure out right angles.