Foursquare (service) definition

(1) Characterized by firm and unwavering conviction

"A foursquare refusal to yield"

(2) With firmness and conviction; without compromise

"He stood foursquare for religious liberty and toleration"- C.G.Bowers

"Dealt straightforwardly with all issues"

(3) In a square position

"The building stood foursquare"

(4) (geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon

"You can compute the area of a square if you know the length of its sides"