doorway

noun
  1. The opening or passage that is closed by a door; an entrance or exit. noun
    She stood in the doorway, waiting for him to arrive.
    The cat slipped quietly through the doorway into the next room.
  2. A means of access or entry to something, often used metaphorically. noun
    Education is a doorway to a better future.
    The internship was a doorway to a permanent position at the company.