1
to be disordered;to be disarranged;to be disarrayed;to be disheveled;to be dishevelled
ダイヤが乱れていた。
The timetable was disrupted.
2
to be discomposed;to be upset;to get confused;to be disturbed
3
to lapse into chaos (due to war, etc.)
Other forms
紊れる 【みだれる】 (rarely used kanji form)