The Vikings were a fearsome nation of traders and explorers who crossed the expanse of the Atlantic Ocean and Northern Europe early in the last millennium. We still connect to their powerful mythology led by the Norse god Odin through the collective unconscious. In modern media mythology, Vikings are ferocious warriors and conquerors.
A dream about a Viking is to be calling upon this masculine-principle form of power to enter your life in some circumstance that is asking you to be more decisive and action-oriented.
The most universal image of a Viking for people today is of a rugged sea traveler who is large in stature and strong in every way.
If a Viking character appears in a dream, you may be being called by something from this mythology through the power of the collective.