steps, stepped, stepping

to step in
phrasal verb

To enter a place or situation suddenly
  • 1He stepped in just as the meeting was about to end.
  • 2She stepped in to see what all the noise was about.
This means to go into a room or a situation quickly, often when something important is happening. For example, if people are arguing, and you walk in to help or stop them, you are doing this action. It is like joining in at an important moment.
Card
People often say "step in" when someone helps solve a problem, like a teacher stepping in to stop a fight between students.
at the animal store
Surprise Visitor
Linda
I was just about to close the store when someone stepped in.
Frank
Really? Who was it?
Linda
It was Mr. Thompson, looking for a new collar for his dog.
Frank
Good thing you hadn't locked up yet!
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