say it: proh-TEE-uhn
protean is an adjective meaning "taking on different forms". It carries one recorded sense.
taking on different forms
“eyes...of that baffling protean grey which is never twice the same”
Definitions, synonyms and semantic relations for protean come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.