A tongue is a universal symbol of speech and it often signifies verbal communication between you and someone else. There are however several different meanings of this dream depending of the circumstances.
If you simply see a tongue in your dream it means that you will quite unexpectedly find yourself being the center of attention. A lot of people will comment on you and your work and you will be quite amazed by amount of attention that will be given to you. Alternative meaning of this dream is that your reputation will increase soon and this increase will be well earned.
If in the dream you were looking at your tongue in a mirror it means that some people will be less truthful when they compliment you and your work. They might have a personal agenda and they are likely using sweet talk in order to get your trust. It does not mean that you need to ask for honesty from everyone you meet though.
If you dream that your tongue is somehow injured making it difficult or even impossible for you to talk in the dream it means that you need to restrain your talkativeness. Your loose lips might sink someone’s ships in a way. You will need also to put more solid content behind your talks.
The meaning of dream in which your tongue is unnaturally long is indicative of you being quite successful in areas in which will require a creative mindset. You might not even realize this consciously but every work will be far more fulfilling for you if you are left to freely tap into creative talents.
If you see a lot of tongues in your dream it can signify that the next few months will be full of business opportunities for you. This might be so pronounced that you might have difficulty choosing the best opportunity.