quadrangularEnglishOxford Dictionary of Englishquadrangular /kwɒˈdraŋɡjʊlə , kwəˈdraŋɡjʊlə / ▸ adjective (of an object or architectural structure) having four sides: a quadrangular sail. ▪ British English (of a sporting contest) involving four teams competing against each other: a boys' quadrangular tournament.