Most dreams are the product of cortical activity which acts to organize the day's cognitive events, which are factual. When they can't be explained as such, the following may be the answer you are looking for.

Precognitive: Dreams which usually fortells events or happenings.

Factual: Dreams which simply confirms or emphasizes a situation that the dreamer is already aware of.

Warning: Dreams which suggest and warn against impending danger.

Inspirational: Dreams which are the lucky dreamers dream. These dreams almost always suggest a solution, or course of action in regard to personal or business problems.

Common: Dreams that occur to almost everyone at some time or another, and which are more easily recalled than any other dreams; some of most common dreams are flying, falling, being naked or being unable to cry out for help when in danger.

A short but useful list in the general rule for dream interpretation might be as follows: Clean or shiny objects usually are good omens. Dull or dirty objects or conditions forecast obstacles or difficulties.

Going up, as in an elevator, steps or escalator indicates success or improvement over existing conditions.

Going down would signify reverses in either personal or business matters.

The vividness and clarity of your dreams is an indication of the importance of the events or warning forecasted by the dreams.Dreams which are vague or hazy are unlikely to have any important significance.