Japanese plum (Noun) — Yellow olive-sized semitropical fruit with a large free stone and relatively little flesh; used for jellies.
Japanese plum (Noun) — Evergreen tree of warm regions having fuzzy yellow olive-sized fruit with a large free stone; native to China and Japan.
Japanese plum (Noun) — Small tree of China and Japan bearing large yellow to red plums usually somewhat inferior to European plums in flavour.