SQUARE
Definition of SQUARE
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A polygon with four sides of equal length and four right angles; an equilateral rectangle; a regular quadrilateral.
Synonyms: tetragon -
Something characterized by a square, or nearly square, form.
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An L- or T-shaped tool used to place objects or draw lines at right angles.
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To adjust so as to align with or place at a right angle to something else; in particular:
"The casting was mounted on a milling machine so that its sides could be squared."
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To resolve or reconcile; to suit or fit.
"John can square this question up for us."
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To adjust or adapt so as to bring into harmony with something.
"I cannot square the results of the experiment with my hypothesis."
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Shaped like a square (the polygon).
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Forming a right angle, especially at right angles with the mast or the keel, and parallel to the horizon; said of the yards of a square-rigged vessel when they are so braced.
"a square corner"
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Of numbers formed by multiplying two equal numbers.
"9 is a square number."
Source: Wiktionary