Definitions of foursquare:

• noun:   (geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon
• adjective:   characterized by firm and unwavering conviction

  Example: "A foursquare refusal to yield"

• adverb:   in a square position

  Example: "The building stood foursquare"

• adverb:   with firmness and conviction; without compromise

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