1. (noun) canker
a fungal disease of woody plants that causes localized damage to the bark
Synonyms: pestilence, canker sore
2. (noun) canker, canker sore
an ulceration (especially of the lips or lining of the mouth)
Synonyms: pestilence, canker sore, canker
3. (verb) pestilence, canker
a pernicious and malign influence that is hard to get rid of
Synonyms: pest, pestilence, plague, canker sore, canker, pestis
4. (verb) canker
become infected with a canker
5. (verb) canker
infect with a canker
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