get in in WordNet English dictionary

1. succeed in a big way; get to the top
   "After he published his book, he had arrived"; "I don't know whether I can make it in science!"; "You will go far, my boy!"
   arrive  make it  get in  go far 
   
2. to come or go into
   "the boat entered an area of shallow marshes"
   enter  come in  get into  get in  go into  go in  move into 
   
3. of trains; move into (a station)
   "The bullet train drew into Tokyo Station"
   pull in  get in  move in  draw in 
   
4. secure a place in a college, university, etc.
   get in  get into 
   

get in in English Wiktionary