Strong's #7251: raba` (pronounced raw-bah')

a primitive root (rather identical with 7250 through the idea of sprawling "at all fours" (or possibly the reverse is the order of deriv.); compare 702); properly, to be four (sided); used only as denominative of 7253; to be quadrate:--(four-)square(-d).

Brown-Driver-Briggs Hebrew Lexicon:

râba‛

1) to square, be squared

1a) (Qal) square (participle)

1b) (Pual) square (participle)

Part of Speech: verb

Relation: a primitive root [rather identical with H7250 through the idea of sprawling "at all fours" (or possibly the reverse is the order of derivation)

Usage:

This word is used 12 times:

 

Exodus 27:1: "broad; the altar shall be foursquare: and the height thereof shall be three cubits."
Exodus 28:16: " Foursquare it shall be being doubled; a span shall be the length thereof, and a span shall be the breadth"
Exodus 30:2: "shall be the length thereof, and a cubit the breadth thereof; foursquare shall it be: and two cubits shall be the height thereof: the horns"
Exodus 37:25: "of it was a cubit, and the breadth of it a cubit; it was foursquare; and two cubits was the height of it; the horns thereof were"
Exodus 38:1: "thereof, and five cubits the breadth thereof; it was foursquare; and three cubits the height"
Exodus 39:9: "It was foursquare; they made the breastplate double: a span was the length"
1 Kings 7:5: "And all the doors and posts were square, with the windows: and light was against light"
1 Kings 7:31: "and also upon the mouth of it were gravings with their borders, foursquare, not round."
Ezekiel 40:47: "and a hundred cubits broad, foursquare; and the altar that was before the house."
Ezekiel 41:21: "The posts of the temple were squared, and the face of the sanctuary; the appearance of the one as the appearance"
Ezekiel 43:16: "shall be twelve cubits long, twelve broad, square in the four"
Ezekiel 45:2: "five hundred in length, with five hundred in breadth, square round about; and fifty cubits"