Entry 1 sense Webster, 1913 Hagberry /(hăg"bĕr`ry̆)/ · Hag·ber·ry · IPA 01 n. A plant of the genus Prunus (Prunus Padus); the bird cherry. 1. A plant of the genus Prunus (Prunus Padus); the bird cherry.(Bot.) [Scot.]