An entrance in a dream symbolizes a change or an opportunity.
If you dream about an entrance, it can be a sign that you going through a transition in you life. For example, you may be moving to a new place, starting a new job or beginning a new relationship.
Standing at an entrance in a dream can mean that you are considering taking advantage of an opportunity or that you need to make a change in your life.
A dream that you walk through an entrance can mean that you are feeling confident about taking a risk.
If you come upon an entrance in your dream, but it is locked so that you pass through it, you feel that something is preventing you from reaching a goal that you have in real life.
If you are passing through a two-part entrance, such as an airlock, it can mean that you need to balance conflicting aspects of your personality before you can move on with your life.