Square (cipher), a cryptographic block cipherSquare (geometry), a regular quadrilateral with four equal sides and four right anglesSquare number, an integer that is the square of another integer
Construction
Square (area), an Imperial unit of floor area and other construction materialsSquare, a public meeting place:
Town square, an open area commonly found in the heart of a traditional town used for community gatheringsMarket square, an open area where market stalls are traditionally set out for tradingGarden square, an open space with buildings surrounding a gardenSquare, a "L" or "T" shaped tool:
Combination square, a tool with a ruled blade and one or more interchangeable headsMachinist square, a metalworking tool used to produce right anglesSteel square, also called a "framing" or "carpenter's" square, produces right anglesTry square, a woodworking tool for checking right anglesSquare, or quadrature, the process of producing right angles
Software Engineering
SQuaRE (Software engineering) a standard for Software product QUAlity Requirements and Evaluation.
Entertainment
Square (album), an album by Buck 65Square (band), a musical trio from Lincoln, Nebraska"Squares", a song by That Handsome Devil from A City Dressed in Dynamite
Companies
Square (company), former video game company that merged with Enix to become Square EnixSquare (conglomerate), a Bangladeshi conglomerate of textiles, pharmaceuticals, toiletries, consumer products companiesSquare (application), a service and device that allows credit card payments to be accepted through mobile devices
Square characters and boxes
Square (character) (■), a written characterㅁ, ᆷ, ᄆ (Hangul characters)ロ (Ro (kana)口, 囗 (Radical 30, Kangxi radical)
Other
Infantry square, a military tactic used by infantry when threatened by cavalrySquare (astrological aspect), an aspect of 90 degreesSquare (dessert), a dessert bar with the texture of a firm cake but softer than a cookieSquare (sailing), to adjust the position of the yardarms on a square-rigged vessel to a 90 degree angle with the keelSquare (slang), several meanings, such as a person or a cigarette