Dreaming of an adder represents an ominous event about to enter your life. The dark cloud may already be hovering over your head without drawing too much attention to it. Beware that your enemies are keeping close tabs on and waiting on the perfect opportunity to drag you down and destroy your comfort zone.
In a dream, an adder can signify many things from envy to greed. It can also represent a person or situation in your life that is poisoning your chances of happiness.
Adders are also symbols for serpents and evilness.