square In geometry, a square is a regular polygon, regular quadrilateral. It has four straight sides of equal length and four equal angles. Squares are special cases of rectangles, which have four equal angles, and of rhombuses, which have four equal si ...

is a regular quadrilateral with four equal sides and four right angles. Square or Squares may also refer to:

Mathematics and science

Square (algebra) In mathematics, a square is the result of multiplying a number by itself. The verb "to square" is used to denote this operation. Squaring is the same as raising to the power 2, and is denoted by a superscript 2; for instance, the square ...

, multiplying a number or expression by itself * Square (cipher), a cryptographic block cipher * Global square, a principle in infinitary combinatorics *

Square number In mathematics, a square number or perfect square is an integer that is the square (algebra), square of an integer; in other words, it is the multiplication, product of some integer with itself. For example, 9 is a square number, since it equals ...

, an integer that is the square of another integer * Square of a graph *

Square wave (waveform) A square wave is a non-sinusoidal waveform, non-sinusoidal periodic waveform in which the amplitude alternates at a steady frequency between fixed minimum and maximum values, with the same duration at minimum and maximum. In an ideal squar ...

, a non-sinusoidal periodic waveform

Construction

* Square (area), an Imperial unit of floor area and other construction materials *Square, a public meeting place: **

Garden square A garden square is a type of communal garden in an urban area wholly or substantially surrounded by buildings; commonly, it continues to be applied to public and private parks formed after such a garden becomes accessible to the public at large. ...

, an open space with buildings surrounding a garden **

Market square A market square (also known as a market place) is an urban square meant for trading, in which a market is held. It is an important feature of many towns and cities around the world. A market square is an open area where market stalls are tradit ...

, an open area where market stalls are traditionally set out for trading **

Town square A town square (or public square, urban square, city square or simply square), also called a plaza or piazza, is an open public space commonly found in the heart of a traditional town or city, and which is used for community gatherings. Relat ...

, an open area commonly found in the heart of a traditional town used for community gatherings *

Square (tool) A square is a tool used for marking and referencing a Right angle, 90° angle, though Miter square, mitre squares are used for 45° angles. Squares see common use in woodworking, metalworking, construction and technical drawing. Some squares incor ...

, an L- or T-shaped tool: **

Combination square A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a Ruler, rule and one or more interchangeable heads that can be attached to the rule. Other names for the tool ...

, a tool with a ruled blade and one or more interchangeable heads ** Machinist square, a metalworking tool used to produce right angles ** Steel square, also called a "framing" or "carpenter's" square, produces right angles ** Try square, a woodworking tool for checking right angles **

T-square A T-square is a technical drawing instrument used by draftsmen primarily as a guide for drawing horizontal lines on a drafting table. The instrument is named after its resemblance to the letter T, with a long shaft called the "blade" and a s ...

, a drafting tool for handdrawing blueprints *

Quadrature (geometry) In mathematics, quadrature is a historic term for the computation of area (mathematics), areas and is thus used for computation of integrals. The word is derived from the Latin ''quadratus'' meaning "square". The reason is that, for Ancient Gr ...

, the process of producing right angles (squaring)

Arts, entertainment, and media

Cinema

* ''The Square'' (2008 film), an Australian neo-noir thriller film * ''The Square'' (2013 film), an Egyptian-American documentary film * ''The Square'' (2017 film), a satirical black comedy film

Music

* ''Square'' (album), an album by Buck 65 * Square (band), a musical trio from Lincoln, Nebraska * ''Square'' (EP), an EP by Red Square Black * "Square", a song by

Mitski Mitsuki Laycock (born September 27, 1990), also known as Mitski Miyawaki, and known professionally as Mitski, is an American singer-songwriter. She Self-publishing, self-released her first two albums, ''Lush (Mitski album), Lush'' (2012), and '' ...

from '' Retired from Sad, New Career in Business'' * "Squares", a song by That Handsome Devil from '' A City Dressed in Dynamite''

Brands and enterprises

Block, Inc. Block, Inc. (formerly Square, Inc.) is an American technology company and a financial services provider for consumers and merchants. Founded in 2009 by Jack Dorsey, it is the U.S. market leader in Point of sale, point-of-sale systems. As of 20 ...

, an American financial services and digital payments company, formerly known as Square Inc. **

Square (financial services) Square is a Point of sale, point-of-sale system for sellers with physical or online stores. Launched in 2009 by Block, Inc., it enables merchants to accept card payments and manage business operations. As of 2024, Square is the U.S. market leader ...

, the payment system operated by Block, Inc. *

Square (video game company) also known under its international brand name SquareSoft, was a Japanese video game developer and publisher. It was founded in 1986 by Masafumi Miyamoto, who spun off the computer game software division of Den-Yu-Sha, a power line constructi ...

, Japanese former video game company *

Squares (crisps) Squares formerly known as Square and Square Crisps are a British brand of square-shaped crisps made by Walkers, a subsidiary of PepsiCo. They were originally made by The Smith's Snackfood Company. History The crisps have been around since at ...

, British brand of crisps

Sports

*Square, the area in the middle of a

cricket Cricket is a Bat-and-ball games, bat-and-ball game played between two Sports team, teams of eleven players on a cricket field, field, at the centre of which is a cricket pitch, pitch with a wicket at each end, each comprising two Bail (cr ...

outfield on which the primary playing surfaces, known as pitches or wickets, are positioned *Square leg, a fielding position in cricket

Square characters and boxes

*■, □, ▪, ▫ (

Geometric Shapes A shape is a graphics, graphical representation of an object's form or its external boundary, outline, or external Surface (mathematics), surface. It is distinct from other object properties, such as color, Surface texture, texture, or material ...

) *ㅁ, ᆷ, ᄆ ( Hangul letter "m") *ロ ( Ro (katakana)) *口 ( Kangxi radical 30, "mouth") *囗 ( Kangxi radical 31, "enclosure") *

\Box

, the symbol of the

D'Alembert operator In special relativity, electromagnetism and wave theory, the d'Alembert operator (denoted by a box: \Box), also called the d'Alembertian, wave operator, box operator or sometimes quabla operator (''cf''. nabla symbol) is the Laplace operator of ...

Other uses

* Square (astrological aspect) * Square (dessert), a cake-like bar *

Square (sailing) The term to square a yard is used when sailing a Square rig, square-rigged ship. To "square a yard" is to lay the yard (sailing), yards at right angles to the line of the keel by trim (sailing), trimming with the braces (sailing), braces. Explanat ...

, to adjust yardarms 90 degrees angle to the keel * ''Square'' (slang), a term for one who is conventional, amongst other meanings *

Infantry square An infantry square, also known as a hollow square or square formation, was a musket-era historic close order formation used in combat by infantry units, usually when threatened with cavalry attack. To deploy its weapons effectively, a traditiona ...

, a military tactic *SQuaRE (Systems and software Quality Requirements and Evaluation), a series of ISO standards numbered starting at 25000; see List of ISO standards 24000–25999#ISO 25000 – ISO 25999