Etymologically

square

Etymology and origin of the English word square

Confidence
Established
Formation
Borrowing
First attested
c. 1250
Borrowed from
Old French esquire via Middle English
Ultimate origin
Latin (quadra)

Pronunciation

  • IPA: UK /skweə/, US /skwer/[1]

Etymology

The noun is inherited from Middle English squire, square,[2][3] borrowed from Old French esquire (“a square, squareness”), also esquarre,[4][2] from Vulgar Latin *exquadra, a back-formation from *exquadrāre (“to square”),[4][2] from ex- (“out”) and quadrāre (“to make square, set in order”),[4] from quadrus (“a square”),[4] related to quattuor (“four”),[2] from Proto-Indo-European *kwetwer- (“four”).[4] The adjective is from Old French esquarré, past participle of esquarrer “to square”, and the verb from esquarrer.[5][3]

Earliest recorded meaning

A tool for measuring or setting out right angles, a carpenter's square: about 1250 in Barnhart[2] and the mid-13th century in Etymonline;[4] the OED's first example is from before 1300.[6]

Semantic evolution

The noun came to mean a square shape or area by the late 14th century,[4][2] and the geometric figure and the number multiplied by itself from 1557.[6][2] A body of troops in square formation is from the 1590s.[4] An open space in a town is from 1687,[2] the 1680s in Etymonline,[4] and in the US a block of buildings bounded by four streets by 1867.[4] The tool gave the figurative sense of exactness and fairness: square, “honest, fair”, is by the 1560s,[4] and is behind fair and square (early 17th century) and square deal.[7] Square meal is by 1868, originally American.[4] The sense “old-fashioned, conventional” is from 1944, in American jazz slang, said to come from a conductor's hand movements in a regular four-beat rhythm.[4] Back to square one is from 1960, probably from board games.[4] The verb meant first to make square, of stone (late 14th century), then to regulate by a standard (1530s) and to balance accounts (1815).[4]

Timeline

  • c. 1250 – a carpenter's square.[2]
  • early 14th century – adjective, with four equal sides.[4]
  • late 14th century – verb, to make square.[4]
  • 1557 – square number; square root.[6]
  • 1560s – honest, fair.[4]
  • 1590s – a body of troops.[4]
  • 1687 – an open space in a town.[2]
  • 1868 – square meal.[4]
  • 1944 – old-fashioned, conventional.[4]
  • 1960 – square one.[4]

Modern meaning

Noun

  1. A flat figure with four equal sides and four right angles.
  2. An open space in a town, often with buildings on all sides.
  3. A T-shaped or L-shaped tool for drawing or checking right angles.
  4. (mathematics) The product of a number multiplied by itself.
  5. (slang) A person thought dull and conventional.

Adjective

  1. Having four equal sides and four right angles.
  2. Of a unit of area: square metre.
  3. Honest, fair: a square deal.
  4. With nothing owed on either side; even.
  5. (slang) Old-fashioned, conventional.

Verb

  1. To make square or rectangular.
  2. To multiply a number by itself.
  3. To bring into agreement; to settle or balance: square an account.

Word family

  • squarely
  • squareness
  • squarer
  • squarable
  • squarelike
  • squarehead
  • square-shouldered
  • square-toed

References

  1. ^ Jones, Daniel (2011), Cambridge English Pronouncing Dictionary, 18th ed., ed. Peter Roach, Jane Setter and John Esling, Cambridge: Cambridge University Press
  2. ^ a b c d e f g h i j Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  3. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  4. ^ a b c d e f g h i j k l m n o p q r s t u v Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
  6. ^ a b c Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  7. ^ Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press

Related etymologies

Cite this entry

“Square.” Etymologically, 15 Oct. 2026, etymologically.com/en/square. Accessed 15 Oct. 2026.

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