noun
a change of the form or nature of a thing or person into a completely different one
-
The caterpillar undergoes a metamorphosis to become a butterfly.
-
Have you seen the amazing metamorphosis of a tadpole into a frog?
-
Dude, that caterpillar just did a total metamorphosis!
-
His journey through college was a metamorphosis, transforming him into a confident adult.