Definition of 'crab apple'

Noun

1. 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
2. any of numerous wild apple trees usually with small acid fruit
      Synonyms: wild apple crabapple
3. small sour apple; suitable for preserving; "crabapples make a tangy jelly"
      Synonyms: crabapple

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