RhymeZone: foursquare definitions

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"

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See foursquare used in context: 2 rhymes, several books and articles.