1. A fungal disease of woody plants that causes localized damage to the bark 
2. An ulceration (especially of the lips or lining of the mouth)
   - canker sore 
3. A pernicious and malign influence that is hard to get rid of
   "according to him, I was the canker in their midst"
   - pestilence

1. Become infected with a canker 
2. Infect with a canker

Derived forms: cankering, cankered, cankers

See also: cankerous

Type of: come down, infect, influence, plant disease, sicken, ulcer, ulceration

Encyclopedia: Canker

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