A square 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 multiplication, multiplying a number by itself. The verb "to square" is used to denote this operation. Squaring is the same as exponentiation, raising to the power 2 (number), 2, and is denoted by a ...

, multiplying a number or expression by itself * Square (cipher), a cryptographic block cipher *

Global square In mathematical set theory, a square principle is a combinatorial principle asserting the existence of a cohering sequence of short closed unbounded (club) sets so that no one (long) club set coheres with them all. As such they may be viewed as a ...

, 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 In graph theory, a branch of mathematics, the th power of an undirected graph is another graph that has the same set of vertices, but in which two vertices are adjacent when their distance in is at most . Powers of graphs are referred to ...

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) The square is an Imperial unit of area that is used in the construction industry in the United States and Canada, and was historically used in Australia. One square is equal to 100 square feet. Examples where the unit is used are roofing shingles, ...

, 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 Town square, 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 square, geometric square, used for community gathe ...

, an open area commonly found in the heart of a traditional town used for community gatherings * Square (tool), an L- or T-shaped tool: ** Combination square, 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 c ...

, 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 * Quadrature (mathematics), 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 described ...

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

Brands and enterprises

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

Square (financial services) Square is a financial services platform developed by Block, Inc. It is aimed at small-and medium-size businesses, allowing them to accept credit card payments and use tablet computers as payment registers for a point-of-sale system. History The ...

, the payment system operated by Block, Inc. * Square (video game company), 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 lea ...

, 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 striki ...

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+2 ...

) *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

Other uses

Square (astrological aspect) In astrology, an aspect is an angle that Planets in astrology, planets make to each other in the Horoscope; as well as to the Ascendant, Midheaven, descendant (astrology), Descendant, Imum coeli, Lower Midheaven, and other points of astrological ...

, 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) 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 the position of the yardarms on a square-rigged vessel to a 90 degree angle with the keel * Square (slang), several meanings * Infantry square, a military tactic used by infantry when threatened by cavalry