Pronunciation: (lok'step"), [key]
1. a way of marching in very close file, in which the leg of each person moves with and closely behind the corresponding leg of the person ahead.
2. a rigidly inflexible pattern or process.
rigidly inflexible: a lockstep educational curriculum.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.