(geometry) A polygon with four sides of equal length and four right angles; an equilateral rectangle; a regular quadrilateral.

Something characterized by a square or nearly square form, such as a cell in a grid, a square piece or surface, the front of a woman's dress over the bosom, a dessert cut into rectangular pieces, or a certain number of lines used in reckoning the prices of advertisements in newspapers.

An open space or park, often in the center of a town, not necessarily square in shape, often containing trees, seating and other features pleasing to the eye, and can also refer to a street surrounding a public square or plaza.

(mathematics) The product of a number or quantity multiplied by itself; the second power of a number, value, term or expression.

(military formation) A body of troops drawn up in a square formation.

(1950s slang) A socially conventional or conservative person; a person who has little or no interest in the latest fads or trends: still sometimes used in modern terminology.

(Britain) The symbol # on a telephone; hash.

(cricket) The central area of a cricket field, with one or more pitches of which only one is used at a time.

(real estate) A unit of measurement of area, equal to a 10 foot by 10 foot square, i.e. 100 square feet or roughly 9.3 square metres. Used in real estate for the size of a house or its rooms, though progressively being replaced by square metres in metric countries such as Australia.

(roofing) A unit used in measuring roof area equivalent to 100 square feet (9.29 m²) of roof area. The materials for roofing jobs are often billed by the square in the United States.

(academia) A mortarboard.

(colloquial, US) Ellipsis of square meal.

The relation of harmony, or exact agreement; equality; level.

(astrology) The position of planets distant ninety degrees from each other; a quadrate.

(slang) Cigarette.

(brewing) A vat used for fermentation.

(slang, MLE) A well-defined core of a human body, a flat section from the fundament to the thoracic diaphragm.

(transitive) Adjust or place something at a right angle to something else, specifically in nautical terms it means to place at a right angle to the mast or keel, and in rowing it means to rotate the oars so that they are perpendicular to the water.

(transitive, intransitive) To resolve or reconcile; to suit or fit.

(transitive) To adjust or adapt so as to bring into harmony with something.

(transitive, mathematics) Of a value, term, or expression, to multiply by itself; to raise to the second power.

(transitive, geometry) To draw, with a pair of compasses and a straightedge only, a square with the same area as.

(transitive, geometry) To tile (completely fill) with squares.

(soccer) To make a short low pass sideways across the pitch

To accord or agree exactly; to be consistent with; to suit; to fit.

To take a boxing attitude; often with up or off.

To form with four sides and four right angles.

To form with right angles and straight lines, or flat surfaces.

To compare with, or reduce to, any given measure or standard.

(astrology) To hold a quartile position respecting.

Shaped like a square (the polygon).

An adjective "square" describes something that forms right angles in all planes, such as box-shaped objects or the yards of a square-rigged vessel when braced correctly.

Used in the names of units of area formed by multiplying a unit of length by itself.

Honest; straightforward; fair.

Satisfied; comfortable with; not experiencing any conflict.

Even; tied

(slang, derogatory) Socially conventional; boring.

(cricket) In line with the batsman's popping crease.

Solid, decent, substantial.

Having a shape broad for the height, with angular rather than curving outlines.

(automotive) Of an internal combustion engine design, in which the diameter of the piston is similar, roughly, approximately, equal to its stroke distance.

Directly.