Knocker 
A door knocker in a dream symbolizes an opportunity. You may have a choice presented to you in which you are called to take action and take risks with the hope of success.
Knocking
To dream of knocking represents the attempt of your subconscious to bring a certain aspect of your life to greater consciousness. This may also mean the coming of a new opportunity.
Door Knocker
*Please see Knocker.
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