Also see definition of "Rank" in Word Study
Rank
RANK [isbe]
RANK - rank: (1) 'orach, used in Joel 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" (1 Ch 12:38 the King James Version; compare 1 Sam 4:16; 17:22,48).See ARMY.
Also see definition of "Rank" in Word Study