Definition

noun

A polygon with four sides of equal length and four right angles; an equilateral rectangle; a regular quadrilateral.
Something characterized by a square, or nearly square, form.
An L- or T-shaped tool used to place objects or draw lines at right angles.
An open space or park, often in the center of a town, not necessarily square in shape, often containing trees, seating and other features pleasing to the eye.
The product of a number or quantity multiplied by itself; the second power of a number, value, term or expression.
“64 is the square of 8.”

verb

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.”
To resolve or reconcile; to suit or fit.
“John can square this question up for us.”
To adjust or adapt so as to bring into harmony with something.
“I cannot square the results of the experiment with my hypothesis.”
Of a value, term or expression, to multiply by itself; to raise to the second power.
To draw, with a pair of compasses and a straightedge only, a square with the same area as.
“square the circle”