Easton's Bible Dictionary: M. G. Easton, M.A., D.D.

Brook

A torrent.

1. Applied to small streams, as the Arnon, Jabbok, etc. Isaiah (Isa. 15:7) speaks of the "book of the willows," probably the Wady-el-Asha.
2. It is also applied to winter torrents (Job 6:15; Num. 34:5; Josh. 15:4, 47), and to the torrent-bed or wady as well as to the torrent itself (Num. 13:23; 1 Ki. 17:3).
3. In Isa. 19:7 the river Nile is meant, as rendered in the Revised Version.