Definitions
1.NounA transformation, such as one performed by magic.
2.NounA noticeable change in character, appearance, function, or condition.
3.NounA change in the form and often habits of an animal after the embryonic stage during normal development (e.g. the transformation of a caterpillar into a butterfly or a tadpole into a frog).
4.NounA change, usually degenerative, in the structure of a specific body tissue.