Fog / Foghorn dream meaning is explained below using 1 different source. Each interpretation is shown with its source.
Interpretation 1 — Raymond Buckland
Uncertainty.
To dream that you are in a ihick mist or fog means that your way in life will often seem dark and perplexing. But, by perseverance and by applying yourself to your own self-development, you will come out of the dark into the light.
To be completely lost in a fog means you are frustrated, not knowing what decision to make.
To hear a foghorn means that there are troubled times coming.
Source: Gypsy Dream Dictionary • Author: Raymond Buckland