red plum

noun

Definition of red plum

1 : a red-fruited plum specifically : either of two American wild plums (Prunus americana and P. nigra)
2 : a variable color averaging a dark purplish red that is bluer and duller than pansy purple or raisin, bluer and paler than Bokhara or dahlia purple (see dahlia purple sense 1), and bluer and less strong than redgrape