used before a unit of measurement to express an area equal to a square with sides of the length mentioned（用于单位前）见方的◆Office rental is €290 per square metre.办公室租金是每平方米 290 欧元。 (abbreviation sq.) used after a number to give a measurement of area（用于数字后表示面积）平方的◆We have about 15 000 square metres of factory space.我们拥有约 1.5 万平方米厂房。 (informal) (all) square if two people are square, neither of them owes money to the other两清；彼此不欠◆Here's the $50 I owed you—now we're square.这是我欠你的 50 元 ── 现在我们两清了。