Waiting Room dream meaning is explained below using 3 different sources. Each interpretation is shown with its source.

Interpretation 1 — DreamForth

To dream that you are in a waiting room suggests that you are in limbo for a particular subject in your waking life. Timing is very important, and there is the likelihood that you are wishing to have access to information that you may not be ready for. Patience is the key here; practice it for pleasing results.
Source: Dream Symbols and Analysis Author: DreamForth

Interpretation 2 — Dr. Mıchael Lennox

The implication of a waiting room is that something important is about to happen.

If your dream takes place in such an environment, look to where in your life you may be anticipating an event or a change in direction.

If you know what you are waiting for in your dream, add that to your interpretation.

Source: Complete Dictionary of Dreams Author: Dr. Mıchael Lennox

Interpretation 3 — Garuda

Vision: Sitting in a waiting room: you are phlegmatic and can’t make decisions/lake the initiative—your chances are good.

Depth Psychology: See Outer Office.

Source: Dreamers Dictionary Author: Garuda