Definitions:
a plane figure with four equal straight sides and four right angles

an open, typically four-sided, area surrounded by buildings in a village, town, or city

the product of a number multiplied by itself

an l-shaped or t-shaped instrument used for obtaining or testing right angles

a person considered to be old-fashioned or boringly conventional in attitude or behaviour

a square meal

having the shape or approximate shape of a square

denoting a unit of measurement equal to the area of a square whose side is of the unit specified

at right angles; perpendicular

level or parallel

(of two people) owing nothing to each other

old-fashioned or boringly conventional

(of rhythm) simple and straightforward.

directly; straight

in a direction transversely across the field or pitch

make square or rectangular; give a square or