(especially in fantasy fiction or mythology) changing or capable of changing state, form, or appearance

a shapeshifting alien disrupts their voyage and attempts to destroy the remnants of humanity

the shapeshifting electronic score

transformation in state, form, or appearance

tales of lycanthropy, the shapeshifting of a human being into the form of a wolf, date all the way back to Ancient Greece

the constant shapeshifting of the flu virus

(especially in fantasy fiction or mythology) undergo a transformation in state, form, or appearance

the second villain is a witch who can shapeshift into a hawk

my journalism career has shapeshifted continuously over the past decade