Powder is usually either something you produce like grinding, something you add to something else, or put on or in yourself; and the reasons behind the action are probably important.
Therefore washing powder is for a cleansing action; face powder for some changing purpose. A powder can often be used to bring a radical change to one, and gunpowder is for explosive situations. In many dreams powder can also be taken as a drug or poison. So it is important to see if you can define what the powder is being used for. If you can define it you might find help by looking up the relevant word.
Coloured powder is a very powerful thing in dreams, and has been used in ancient rituals and was probably powdered clay or coloured rock.
White powder: Often suggests thoughts or feelings about drugs and your relationship with them, or poison. The dream might be indicating that you are doing something, or have taken in something that is detrimental or beneficial depending on the dream.
Ash as powder: In dreams fire can often be shown as a cleansing or transforming influence. It can reduce solid things to dust, and what is left in the dust is what is lasting and survives all trials, pain and misery. The dust is also the soil, the minerals and fertility for growth. See temple; spirit
Example: I was on a road and noticed that a magnificent elephant had appeared. It had enormous tusks and ears, the latter being powdered with blue dust and adding tremendously to its impact. As it was coming in my direction I was frightened and began to run. I ran off the road, over a fence into a field. I thought the elephant would be stopped by the fence. It wasn’t. It walked straight through it after me. Then I tried to climb a low bank back to the road. The elephant was drawing nearer and I was so frightened I could hardly move to climb the bank. The elephant caught hold of me and I suddenly realised it wasn’t going to destroy me, but wanted, despite it being a magnificent and powerful beast, to sit me on its back. I was still frightened however and ran to a doctor’s surgery. The elephant came and, thrusting its trunk into the surgery, drew me out to it.
Example: I sense her breasts are small and quiescent. Her back is straight and her buttocks narrow. She is still and calm but occupied in pouring powdered paint onto a papier mache relief map, which instantly transforms the territory beyond into a colourful, exotic landscape filled with African animals of all description leaping and running with enormous energy.
Example: A rather shadowy man gave me a leather pull-string purse or pouch. In the pouch was powder that the man suggested I pour onto my rather stained trousers. Immediately the powder started working like yeast, cleansing and purifying my trousers in a spreading action. I knew that this yeast, or pollen, had also penetrated my body, and was gradually working through me, purifying and healing. – Adrian.
Useful questions or hints:
What type of powder was in the dream?
Did I make use of the powder in any way?
Did I have any feelings about the powder?
Was colour involved in the dream?