tam-tam Syllabification: (tam-tam)Pronunciation: /ˈtəm ˌtəm, ˈtam ˌtam/Definition of tam-tam noun a large metal gong with indefinite pitch. Origin: mid 19th century: perhaps from Hindi ṭam-ṭam (see tom-tom)tam-tam in other Oxford dictionaries Definition of tam-tam in the British & World English dictionary