- Also called damson plum. the small, dark-blue or purple fruit of a plum, Prunus insititia, of the rose family, introduced into Europe from Asia Minor.
- a medium to dark violet.
- of the color damson.
- a small rosaceous tree, Prunus domestica instititia (or P. instititia), cultivated for its blue-black edible plumlike fruit and probably derived from the bullaceSee also plum 1 (def. 1)
- the fruit of this tree