Wiktionary
n. 1 (context sometimes military English) A manner of walking in which a person or group proceeds at a controlled pace in a deliberate, steady, rhythmic manner. 2 (context music English) A march with a relatively slow tempo. 3 (context idiomatic by extension English) A progression or unfolding of events which occurs in an unhurried, steady, deliberate manner.
Usage examples of "slow march".
There had been enough time for Brutus to bring him with the others, but now Julius felt each step as a slow march to destruction.
Hokanu gathered her into the crook of his arm and steadied her into the slow march.
And I don't know who the considerate chap was who drew the curtains to, but suddenly we were alone, and somehow I was on my feet with her clinging to me, her legs clasped round my hips, moaning as I settled her in place and began the slow march, up and down, keeping time to the tom-toms, and I fear I broke the rules, for I removed the jewel manually before it did me a mischief.