protestation n. + Add to list US //ˌpɹoʊˌtɛsˈteɪʃən// UK //pɹətɪstˈeɪʃən// protes·ta·tion Archaic SynonymsEtymology Synonyms protestOriginLATprōtestātiō→ENprotestation From Old French protestacion, from Latin prōtestātiō.