Meaning
(1) 'orach, used in Joe 2:7 of the advance of the locust army which marched in perfect order and in straight lines, none crossing the other's track.
(2) ma`arakhah, "battle array" (1Ch 12:38 the King James Version; compare 1Sam 4:16, 1Sam 17:22, 1Sam 17:48).
See ARMY.