1 ADJ (支持)坚定不移的，坚决的 To stand four-square behind someone or something means to be firm in your support of that person or thing. (支持)坚定不移的，坚决的
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They stood four-square behind their chief, and they would not accept pressure on him to resign.
他们坚决支持自己的领导，而且不允许任何压力迫使其辞职。
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He was still certain that Franklin was four-square for reform.
他还是很确信富兰克林会坚定不移地支持改革。
2 ADJ [usually ADJ n] (建筑或结构)方方正正的，方正牢固的 A four-square building or structure is square in shape and looks solid and well-built. (建筑或结构)方方正正的，方正牢固的