Definition of plum pie in US English:

plum pie

noun

  • 1A pie containing raisins and currants; especially a mince pie. Now historical.

  • 2A pie containing plums or prunes.

Origin

Late 16th century; earliest use found in William Warner (d. 1609), poet and lawyer. From plum + pie.

Pronunciation

plum pie

/ˌplʌm ˈpʌɪ/