Do dreams have meaning?

No, not really, though it is common to include real places, people or events in these fleeting things.

Mine normally invent highly-detailed but totally fictitious locations with or without real companions. Sometimes they recall former work-colleagues but in [i]very[/i] surreal images of the work-place.

Dreams, however vivid, are very brief, insubstantial and thought to be a by-product of the brain's memory "house-keeping" necessary, while it has made us sleep so it can do Very Important Things (including simply keeping us alive) without us distracting it. We normally forget them very rapidly on waking, too; so rapidly that you can think you did not dream anything even when you did in fact.

Those who want to "analyse" or "interpret" dreams are either just plain wrong, or are trying to extract money from the gullible by writing books purporting to do those things.

They work, so to speak, by applying vague generalising and leading questions so that if they make you recall a dream that somehow matches one of their generalisations, you tend to latch onto it and think the tenuous co-incidence, "proof". It's a simple but very old trick, developed down the ages by prophets, fortune-tellers, astrologers and other such soothsayers - too many of them fraudulently, too.