- run in(to something)
- run in(to something)1. [for a liquid] to flow into something or a place. •
The water is running into the basement!
•It's running in very fast.
2. to enter something or a place on foot, running. •The boys ran into the room and out again.
•They ran in and knocked over a lamp.
3. to stop by a place for a quick visit or to make a purchase quickly. •I have to run in the drugstore for a minute.
•I ran into the store for a loaf of bread.
•I want to visit Mrs. Potter. I can't stay long. I can only run in for a minute.
Dictionary of American idioms. 2013.