Small cherry much liked by birds

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Hagberry \Hag"ber`ry\ (h[a^]g"b[e^]r`r[y^]), n. (Bot.) A plant of the genus Prunus ( Prunus Padus ); the bird cherry. [Scot.]

WordNet Word definitions in WordNet
n. small cherry much liked by birds

Wiktionary Word definitions in Wiktionary
n. 1 ''Prunus padus'', a species of cherry native to northern Europe and northern Asia, the bird cherry. 2 Its bittersweet astringent fruit, readily eaten by birds and Russians.