canker UK /ˈkæŋkə/US /ˈkæŋkɚ/noun 9verb 4forms 3 noun9 •A plant disease marked by gradual decay. •An obstinate and often incurable disease of a horse's foot, characterized by separation of the horny portion and the development of fungoid growths. Usually resulting from neglected thrush. •An avian disease affecting doves, poultry, parrots and birds of prey, caused by Trichomonas gallinae. •Anything which corrodes, corrupts, or destroys.the canker of destitution and violence. •A region of dead plant tissue caused by such a disease.Slightly sunken brown cankers of variable size and shape affect stem parts primarily below the soil line. — 1977 •A corroding or sloughing ulcer; especially a spreading gangrenous ulcer or collection of ulcers in or about the mouth. •A worm or grub that destroys plant buds or leaves; cankerworm.loathsome canker lives in sweetest bud[…] — 1609 •A kind of wild rose; the dog rose.To put down Richard, that sweet louely Rose, And plant this thorne, this canker Bullingbrooke? — 1597 •(rare) A crab.This Castoꝛ liueth by water and lande, he loueth to feede vpon Crabbes and Cankers of the Sea. — 1562 verb4 •To affect as a canker; to eat away; to corrode; to consume.Still onward winds the dreary way; / I with it; for I long to prove / No lapse of moons can canker Love, / Whatever fickle tongues may say. — 1850 •To waste away, grow rusty, or be oxidized, as a mineral. •To infect or pollute; to corrupt. •To be or become diseased, or as if diseased, with canker; to grow corrupt; to become venomous.as with age his body uglier grows, So his mind cankers. — 1610 formscankered · cankering · cankers