foursquare (Adjective) — Characterized by firm and unwavering conviction. ex. "a foursquare refusal to yield"
foursquare (Noun) — (geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon. ex. "you can compute the area of a foursquare if you know the length of its sides"
foursquare (Adverb) — In a square position. ex. "the building stood foursquare"
foursquare (Adverb) — With firmness and conviction; without compromise. ex. "he stood foursquare for religious liberty and toleration"