What does it mean to dream of what does rudiments mean?

The question is difficult to understand as it is written. It seems to ask the meaning of a dream that is itself about a question: "what does 'rudiments' mean?" The answer to that question would be "the fundamentals of some subject." For example, the rudiments of reading would be the alphabet, punctuation and basic grammar. The broader meaning of the dream might be that you need to consider your basic principles: what is most important to you? What are your essential beliefs and values? The dream could be an indication that trivialities have distracted you from what is most important.