The definition of amorphous is something that does not have a distinct form or shape.(adjective)
A ghostly shadow is an example of an amorphous shadow.
See amorphous in Webster's New World College Dictionary
Origin: ModL amorphus < Gr amorphos < a-, without + morphē, form
See amorphous in American Heritage Dictionary 4
Origin: From Greek amorphos
Origin: : a-, without; see a-1
Origin: + morphē, shape.
Learn more about amorphous