What does “a foot in the door” idiom mean?
If I were a salesman and knocked on your door, you might want to slam the door in my face, not because I am evil, but because you did not want to be bothered at that time. If I got my foot in the door it would be more difficult for you to get rid of me. In like manner when someone has a goal and are able to make initial progress toward that goal he or she has gotten a foot in the door. The expression is most frequently used in regards to employment, where getting your foot in the door refers to obtaining an entry level position.
