halfpennyEnglishOxford New American Dictionaryhalfpenny /ˈhāp(ə)nē, , ˈheɪp(ə)ni , ˈhafˌpenē, ˈhæfˌpɛni / ▸ noun (plural for separate coins halfpennies, for a sum of money halfpence /-pəns/) a former British coin equal to half an old or new penny. The last halfpenny was withdrawn in 1984: seven pennies and three halfpennies.