Key
A key stands for solutions and opportunity. Opening a door with one is a good omen that a blocked matter clears and a new path opens, and being handed a key reads as taking on authority or responsibility. Holding a ring of keys means several options are open to you. Losing a key, or finding it will not fit the lock, signals the wrong method — change your approach rather than forcing it.
A key does nothing on its own, and becomes useful only where a lock happens to fit it. Traditional reading took the key as authority and know-how and read gaining one favourably. Whether you opened something or lost it is the dividing line.
Readings by Situation
Opening a door with a key
A good sign that something blocked comes loose. Tradition read a door opening as a new road appearing. Brightness beyond the door reads more strongly still.
Gaining or being handed a key
A sign that authority or a method comes into your hands. Tradition read receiving a key as being given a position. Take it as a time when something is entrusted to you.
Losing a key
This reflects not seeing a way to solve something. Tradition read losing a key as a signal to pause. It is also read as a call to find another door.
A key that does not fit
A sign that this method will not do it. If you forced the turn, something is being strained. Reading it as a call to change your approach is safe enough.
Key dreams are broadly favourable. Losing one does not make an opportunity disappear. Read a key that does not fit as a sign that another door exists.