1
                           general:: 
                            Phrase(s): 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., Phrase(s): run someone in 
to arrest one and take one to the police station.  •  The cop ran George in so they could question him extensively.  •  They ran in George to protect him from the rioters., Phrase(s): run something in (for something) 
to bring or drive something quickly into a place for some purpose.  •  I have to run my car in for an oil change.  •  I will run in the truck for the mechanic to take a look at it., Phrase(s): run something in 
Go to run something into something., Phrase(s): run in something 
to compete in something, such as a race or an election.  •  I will run in the one-hundred-yard dash.  •  I will not run in a race this time.  •  Who will run in this year’s election?
                        
                        
 
                        
                            McGrawhill's American Idioms And Phrasal Verbs
                        
                        
                    
                    
                        2
                           general:: 
                            1. Insert or include something extra, as in Can you run this map in with the text? [Early 1800s] 2. Also, run on. In printing, make a solid body of text without a paragraph or other break, as in The quotation should be run in rather than set as a paragraph. 3. Also, run someone in. Take someone into custody, as in The police were going to run him in, but he got away. [Slang; mid-1800s] 4. Visit someone briefly, as in If I have time, I'll run in to see Aunt Mary. [Second half of 1800s] 5. Break something or someone in, as in Let's run in the new model on a short flight. [Early 1900s]  Also see  RUN INTO.
                        
                        
 
                        
                            American Heritage Idioms