Door
An opportunity — open, closed, or the kind you have to choose to walk through.
An open door in a dream is an opportunity that is genuinely available. A closed but unlocked door is one you are pretending is closed. A locked door is one that needs more time, more preparation, or a key you do not yet have.
Multiple doors is a choice. Which one you reach for matters less than the act of reaching — the dream is checking whether you have stopped waiting to be invited.
A door knocking from the other side is something asking entry into your life. Watch what you do — opening the door is the active reading; pretending not to hear it is the avoidant one.
Where you often see it. A door newly opened. A door that has been locked behind you. A door you do not remember being in this house. The dream uses the door for an opportunity — open, closed, or the kind you have to choose to walk through.
What it is not. A door is not always promise. The dictionary reads it as the access-point the dreamer is being shown.
Related in the dictionary. Read door with opening, closing, gate, key, and any scene where a passage is the question.