Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with a weapon and thunder) A cannon in a dream indicates an oppressive ruler or a great war. Its sound indicates strife and fear.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) A cannon indicates tremendous news or wide fame.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) A cannon is interpreted as worry and fear. Whoever sees himself hearing its sound will be afflicted with fear.