An expert in a dream signifies that you have accomplished your goals and are confident enough to impart your knowledge to those around you. You are an established figure of authority in your field of expertise.
When someone sees an expert in their dream, it is a sign of success and being at the top of their class or level. It can also represent someone who is at the top of their game.
The interpretation for seeing an expert in a dream really depends on the person’s experience with that expert. If you have never met this person before, then you could have just been admiring them from afar and the sense of admiration is what translated into this dream.