Cistern in Easton's Bible Dictionary

the rendering of a Hebrew word _bor_, which means a receptacle for water conveyed to it; distinguished from _beer_, which denotes a place where water rises on the spot (Jer. 2:13; Prov. 5:15; Isa. 36:16), a fountain. Cisterns are frequently mentioned in Scripture. The scarcity of springs in Israel made it necessary to collect rain-water in reservoirs and cisterns (Num. 21:22). (See WELL -T0003803.) Empty cisterns were sometimes used as prisons (Jer. 38:6; Lam. 3:53; Ps. 40:2; 69:15). The "pit" into which Joseph was cast (Gen. 37:24) was a _beer_ or dry well. There are numerous remains of ancient cisterns in all parts of Israel.