Galba Syllabification: (Gal·ba)Pronunciation: /ˈgalbə/Definition of Galba (circa 3 bc- ad 69), Roman emperor ad 68-69; full name Servius Sulpicius Galba. The successor to Nero, he aroused hostility because of his severity and parsimony and was murdered in a conspiracy organized by Otho. Galba in other Oxford dictionaries Definition of Galba in the British & World English dictionary