Having four equal sides; square.
Solid, robust.
Pertaining to the International Church of the Foursquare Gospel.
Pertaining to a four-square cipher.
A boxy style of domestic architecture with four rooms to a floor, one of which is usually a stair hall.
A four-square cipher.
square-shaped
of a function, of the form y=ax²+bx+c.
of a polynomial, involving the second power (square) of a variable but no higher powers, as ax²+bx+c.
of an equation, of the form ax²+bx+c=0.
A quadratic polynomial, function or equation.