n.

1. （大学的）四周有建筑物围绕的方院；方院四周的建筑物

n.

1. 四胞胎之一；同类四个构成的一组
2. 四倍

n.

1. 【印】空铅；嵌条

n.

1. a quadrangle.
2. a quadruplet.
3. quadraphony.
4. (in telephony) a group of four insulated conductors twisted together.
5. Printing  a small metal block lower than type height, used in letterpress printing for filling up short lines. [abbrev. of the earlier printing term quadrat.]