Definition of 'crab apple'
- any of numerous varieties of crab apples cultivated for their small acid (usually bright red) fruit used for preserving or as ornamentals for their blossoms
Synonyms: crabapple cultivated crab apple
- any of numerous wild apple trees usually with small acid fruit
Synonyms: wild apple crabapple
- small sour apple; suitable for preserving; "crabapples make a tangy jelly"