Other forms: metamorphosed; metamorphosing
If you've ever seen a caterpillar emerge from its cocoon transformed into a butterfly, you've watched it metamorphose, or change completely.
Use the verb metamorphose to describe a total transformation, like an egg into a bird or a seed into a tomato plant. When someone or something changes in appearance, they also metamorphose, the way a messy kid does when he tucks in his shirt and combs his hair. The origins of the word metamorphose lie in the Greek meta, or "change," and morphe, "form."