expression, noun-modifying (irregular)
perfectly ordered; perfectly coordinated
Describes a group or arrangement that is flawlessly synchronized or uniform, often used for military formations, dance, or precise teamwork. The negative form ぬ is classical but still common in this set phrase.
See also: 一糸乱れず (いっしみだれず)
The audience was overwhelmed by the athletes' perfectly coordinated movements.
A perfectly ordered formation marches on.
A fixed expression combining 一糸 (one thread) with 乱れぬ (classical negative of 乱れる, 'to be disordered'), literally meaning 'not a single thread is out of place'. The phrase emphasizes perfect order and coordination.