Foursquare
Morrish Bible Dictionary [1]
This may perhaps be said to be the most perfect earthly shape of a plane (the 'cube' being perfection for a solid). See 'four' under NUMBFRS. It was the shape of the brazen altar, Exodus 27:1; Exodus 38:1; the breastplate, Exodus 28:16; Exodus 39:9; and the altar of incense, Exodus 30:2; Exodus 37:25 . Apparently it was the shape of the 'panels' of the base of the molten sea in Solomon's temple, 1 Kings 7:31; also of the court of the future temple, Ezekiel 40:47; the altar of the same, Ezekiel 43:16; the portion of the land offered as a holy oblation, Ezekiel 48:20; for the sanctuary, Ezekiel 45:2; and for the city, Ezekiel 48:16 .
Vine's Expository Dictionary of NT Words [2]
"four-cornered" (from tetra, see above, and gonia, "a corner, or angle"), is found in Revelation 21:16 .
King James Dictionary [3]
Foursquare a. Having four sides and four angles equal quadrangular.
Webster's Dictionary [4]
(a.) Having four sides and four equal angles.
International Standard Bible Encyclopedia [5]
fōr´skwār ( רבע , rābha‛ ; τετράγωνος , tetrágōnos ): "Foursquare," meaning equal in length and breadth, not round, is the translation of rābha‛ (from obsolete rebha‛ , "four"); it occurs in the description of the altar of burnt offering ( Exodus 27:1; Exodus 38:1 ); of the altar of incense ( Exodus 30:2; Exodus 37:25 ); of the breastplate of the high priest ( Exodus 28:16; Exodus 39:9 ); of the panels of the gravings upon the mouth of the brazen or molten sea in Solomon's temple ( 1 Kings 7:31 ); of the inner court of Ezekiel's temple ( Ezekiel 40:47 ); of "the holy oblation" of the city of Ezekiel's vision ( Ezekiel 48:20 , rebhı̄‛ı̄ , "fourth"); of the new Jerusalem of John's vision ( Revelation 21:16 , τετραγονος , tetragonos ), and conveys the idea of perfect symmetry. In the King James Version marginof 1 Kings 6:31 , we have "five-square," square being formerly used for equal-sided, as it still is in "Three-square file."