To see a long beard in your dream is representative of old age and insight, and wisdom. If you dream that you have a beard, but you do not have on in real life, then the dream means that you are trying to conceal your true feelings. You are being deceptive about some matter. Alternatively, the dream represents your individualistic attitude. You do not care what others think or say about you.
If you have a beard in real life, but dream that you are clean-shaven indicates a desire to reveal more of yourself. There is something that you want to say and you want to make sure it is expressed clearly.
If you are a woman and you dream of growing a beard, then it highlights the masculine aspect of your personality. You want to be more assertive and have more power. Alternatively, the dream means that you are hiding your true character.