crab apple

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of several deciduous trees of the genus Malus, native to North America and Eurasia and having clusters of white, pink, or reddish flowers.
2. n. The small tart fruit of such a tree, sometimes used to make jelly and preserves.

Century Dictionary and Cyclopedia

1. n. Same as crab.

Wiktionary

1. n. alternative spelling of crabapple.

GNU Webster's 1913

1. n. a small, sour apple, of several kinds; also, the tree which bears it; as, the European crab apple (Pyrus Malus var. sylvestris); the Siberian crab apple (Pyrus baccata); and the American (Pyrus coronaria).

WordNet 3.0

1. n. any of numerous wild apple trees usually with small acidic fruit
2. n. any of numerous varieties of crab apples cultivated for their small acidic (usually bright red) fruit used for preserves or as ornamentals for their blossoms
3. n. small sour apple; suitable for preserving
4. n. small sour apple; suitable for preserving
5. n. any of numerous wild apple trees usually with small acidic fruit
6. n. any of numerous varieties of crab apples cultivated for their small acidic (usually bright red) fruit used for preserves or as ornamentals for their blossoms