A pig dream is a classic lucky dream symbolizing wealth and abundance in Korean tradition. A plump, healthy pig signifies a great rise in financial fortune. Holding a piglet or a pig entering your home also predicts a great windfall or lottery win. Slaughtering or cooking a pig is also interpreted as a lucky dream with incoming wealth.
Animals appearing in dreams — as in "Pig Dream" — often symbolize instinct or a suppressed impulse in Jung's theory of Archetypes. The specific animal and the emotion it evokes in you both shape the meaning far more than a generic dream dictionary entry can.
What was the first emotion you felt when you saw that animal in the dream?