Panini Syllabification: (Pa·ni·ni)Pronunciation: /ˈpänēnē/Definition of Panini Indian grammarian. Sources vary as to when he lived, with dates ranging from the 4th to the 7th century bc. He is noted as the author of the Eight Lectures, a grammar of Sanskrit. Panini in other Oxford dictionaries Definition of Panini in the British & World English dictionary