What does baba mean in English?

If you are questioning the meaning of "Bab" as in the name of the Prophet founder of the Babi religion, it is Persian for "Gate" or "Door." In the Baha'i Faith the Bab is acknowledged as the first of the Twin Messengers prophecied in all Sacred Texts, who preceded Baha'u'llah ("glory of God/Lord"). If this is not what you are asking, please rephrase your question. The Word "bab" is NOT in the dictionary, so it's unknown exactly what you mean.