Fantastical means something that is imaginative, extraordinary or incredible. It refers to things that are not real or impossible but exist in someone's imagination or in a work of fiction. The term can be used to describe events, creatures, places or objects that are beyond the normal and everyday experiences of people. Fantastical elements often involve magic, mythology, or supernatural occurrences, and they can evoke feelings of wonder, amazement, or amusement in those who encounter them.