/ ˈlɒkstep; NAmE ˈlɑːk-/ noun [ U ] ( especially NAmE )
1.
a way of walking together where people move their feet at the same time :
The coffin was carried by six soldiers walking in lockstep .
( figurative )
Politicians and the media are marching in lockstep on this issue (= they agree) .
2.
a situation where things happen at the same time or change at the same rate :
a lockstep approach to teaching
Cases of breathing difficulties increase in lockstep with air pollution.