noun.
Any of the wild varieties of apple tree, genus Malus, which generally yield small, bitter fruit (in comparison to domestic apples, Malus domestica.
noun.
The fruit of this tree.
noun.
An unpleasant person; a person who is crabby.
Word Usage
"In recent years, Cedar Waxwings have increasingly turned to crops and ornamentals such as crabapple, hawthorn, firethorn, pepper tree, Russian olive in the West, and non-native honeysuckle in the East as winter food sources."