definition of
[canker]

[1] #1 canker n. a fungal disease of woody plants that causes localized damage to the bark. wn

[2] #2 canker v. become infected with a canker. wn

[3] #3 canker n. [canker sore] an ulceration (especially of the lips or lining of the mouth). wn

[4] #4 canker v. infect with a canker. wn

[5] #5 canker n. [pestilence] a pernicious and malign influence that is hard to get rid of; "racism is a pestilence at the heart of the nation"; "according to him, I was the canker in their midst". wn