Wiktionary
vb. (context intransitive English) To act as a replacement or substitute.
WordNet
Usage examples of "step in".
More, they saw the special session of the Keys as the first step in vindicating their Steadholder and punishing the men who'd deliberately planned that atrocity to destroy her, and there was a grim, hard light in their eyes at the prospect.
Operation Dagger was only the first step in his own personal campaign.
More, they saw the special session of the Keys as the first step in vindicating their Steadholder and punishing the men who’.
Operation Dagger was only the first step in his own personal campaign—.
One comes to the point where one must take a step in one direction or another.
In matters political, though, Germans without orders were as helpless as so many unweaned babes, fearing to take a step in any direction.