Pronunciation: (prō'tē-un, prō-tē'-), [key]
1. readily assuming different forms or characters; extremely variable.
2. changeable in shape or form, as an amoeba.
3. (of an actor or actress) versatile; able to play many kinds of roles.
4. (cap.) of, pertaining to, or suggestive of Proteus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.