square In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length a ...

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) In cryptography, Square (sometimes written SQUARE) is a block cipher invented by Joan Daemen and Vincent Rijmen. The design, published in 1997, is a forerunner to Rijndael, which has been adopted as the Advanced Encryption Standard. Square was ...

, 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 of an integer; in other words, it is the product of some integer with itself. For example, 9 is a square number, since it equals and can be written as . The u ...

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

Square wave A square wave is a 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 square wave, the transitions b ...

, 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 The market square (or sometimes, the market place) is a square meant for trading, in which a market is held. It is an important feature of many towns and cities around the world.Town square A town square (or square, plaza, public square, city square, urban square, or ''piazza'') is an open public space, commonly found in the heart of a traditional town but not necessarily a true geometric square, used for community gatherings. ...

, 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 90° angle, though mitre squares are used for 45° angles. Squares see common use in woodworking, metalworking, construction and technical drawing. Some squares incorporate a scale for measur ...

, 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 rule and one or more interchangeable heads that can be attached to the rule. Other names for the tool includ ...

, a tool with a ruled blade and one or more interchangeable heads **

Machinist square A machinist square or engineer's square is the metalworkers' equivalent of a try square. It consists of a steel blade inserted and either welded or pinned into a heavier body at an angle of 90°. Usually a small notch is present at the inside ...

, a metalworking tool used to produce right angles **

Steel square The steel square is a tool used in carpentry. Carpenters use various tools to lay out structures that are square (that is, built at accurately measured right angles), many of which are made of steel, but the name ''steel square'' refers to a s ...

, also called a "framing" or "carpenter's" square, produces right angles **

Try square A try square or try-square is a woodworking tool used for marking and checking 90° angles on pieces of wood. Though woodworkers use many different types of square, the try square is considered one of the essential tools for woodworking. The ''s ...

, a woodworking tool for checking right angles *

Quadrature (mathematics) In mathematics, quadrature is a historical term which means the process of determining area. This term is still used nowadays in the context of differential equations, where "solving an equation by quadrature" or "reduction to quadrature" means ...

, the process of producing right angles (squaring)

Arts, entertainment, and media

Music

* ''Square'' (album), an album by Buck 65 *

Square (band) Square was a short-lived musical trio from Lincoln, Nebraska who moved to Southern California in early 2000. It was composed of Sean Beste (vocals and keyboards), James Valentine (guitars) and Ryland Steen (drums). Their sound has been descri ...

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

Mitski Mitski Miyawaki (born Mitsuki Laycock; September 27, 1990), known professionally by the mononym Mitski, is a Japanese-born American singer-songwriter. Mitski self-released her first two albums, ''Lush'' (2012) and ''Retired from Sad, New Career ...

from ''

Retired from Sad, New Career in Business ''Retired from Sad, New Career in Business'' is the second studio album by Japanese-American musician Mitski. Mitski self-released the project on August 1, 2013 while still a student at SUNY Purchase. The album was her senior project and featured a ...

'' * "Squares", a song by That Handsome Devil from ''

A City Dressed in Dynamite ''A City Dressed in Dynamite'' is the debut album by That Handsome Devil, released in 2008. It was recorded at Cybersound Studios in Boston, Massachusetts. The songs featured on the album are darker in tone and content than those on the band's ...

Brands and enterprises

Block, Inc. Block, Inc. (formerly Square, Inc.) is an American multinational technology conglomerate founded in 2009 by Jack Dorsey and Jim McKelvey and launched its first platform in 2010. It has been traded as a public company on the New York Stock Exch ...

, an American financial services and digital payments company, formerly known as Square Inc. ** Square (financial services), the payment system operated by Block, Inc. *

Square (video game company) (also known under its American brand name SquareSoft) was a Japanese video game development studio and publisher. It was founded in 1986 by Masafumi Miyamoto, who spun off part of his father's electronics company Den-Yu-Sha. Among its early e ...

, Japanese former video game company * Squares (crisps), British brand of crisps

Sports

*Square, the area in the middle of a

cricket Cricket is a bat-and-ball game played between two teams of eleven players on a field at the centre of which is a pitch with a wicket at each end, each comprising two bails balanced on three stumps. The batting side scores runs by st ...

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 Geometric Shapes is a Unicode block of 96 symbols at code point range U+25A0–25FF. U+25A0–U+25CF The BLACK CIRCLE is displayed when typing in a password field, in order to hide characters from a screen recorder or shoulder surfing. U ...

) *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 M ...

Other uses

* Square (astrological aspect), an aspect of 90 degrees *

Square (dessert) In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length ...

, a dessert bar with the texture of a firm cake but softer than a cookie * Square (sailing), to adjust the position of the yardarms on a square-rigged vessel to a 90 degree angle with the keel *

Square (slang) ''Square'' is slang for a person who is conventional and old-fashioned, similar to a Fuddy-duddy. This sense of the word "square" originated with the American jazz community in the 1940s, in reference to people out of touch with musical trends. ...

, several meanings *

Infantry square An infantry square, also known as a hollow square, was a historic combat formation in which an infantry unit formed in close order, usually when it was threatened with cavalry attack. As a traditional infantry unit generally formed a line to adv ...

, a military tactic used by infantry when threatened by cavalry