lockstep I. \ˈ ̷ ̷ˌ ̷ ̷\noun : a mode of marching in step by a body of men (as prisoners) going one after another as closely as possible II. noun : a complete, rigid, and often automatic synchronism, agreement, or conformity — often used with in < politicians marching in lockstep with the party line > < following a lockstep curriculum >