In many ways, a Bible dictionary is a misnomer, that is, it isn’t the best name for it. In many ways, it is a one-volume encyclopaedia. It is far more than just a definition of Bible words; it is a brief summary of Bible concepts, whether those be people, places, events, doctrines or even summaries of books of the Bible. As such it is an indispensable tool that should be in the library of every Bible student.
My first Bible dictionary was the Zondervan Bible Dictionary which was later updated to the Zondervan Pictorial Bible Dictionary and though I now have a number of Bible dictionaries, it is the one that I still reference most often and I would highly recommend.