Lock-step. A mode of marching by a body of men going one after another as closely as possible, in which the leg of each moves at the same time with and closely follows the corresponding leg of the person directly before him. [Thomas Wilhelm, "Military Dictionary and Gazetteer," Philadelphia, 1881]
Figurative use by 1836.
- lock washer,
- lock, air,
- lock, stock, and barrel,
Examples from the Web for lock-step
Now, those same resources often work in lock-step with the armed rebellion.Spinmeister Ammar al-Wawi Peddles Upbeat Message of Syrian Rebellion|Mike Giglio|July 30, 2012|DAILY BEAST
Obviously, modern Germans do not march in lock-step like their ancestors.
Only on rare occasions are there exceptions to the lock-step unity of petrol power.
As they entered the door of our hall, they broke the lock-step and took their hands down from the shoulders of their line-mates.
Now, if there is any one manœuvre on which the Walton infantry prides itself, the "lock-step and sit-down" is that one.
They moved slowly forward along the deserted tunnel, not unlike two convicts in lock-step.Beth Norvell|Randall Parrish
When we go off for lunch, we throw the machines into lock-step.Meeting of the Board|Alan Edward Nourse
I lingered no longer, but put on the insignia of shame and got my first taste of marching the lock-step.