English

Definition of tumour noun from the Oxford Advanced Learner's Dictionary

 

tumour

 noun
(especially US English tumor) noun
BrE BrE//ˈtjuːmə(r)//
 
; NAmE NAmE//ˈtuːmər//
 
 
jump to other results
a mass of cells growing in or on a part of the body where they should not, usually causing medical problems a brain tumour a benign/malignant (= harmless/harmful)tumour Word Origin late Middle English: from Latin tumor, from tumere ‘to swell’.Extra examples He developed a brain tumour. a malignant tumour on the eyelid a primary tumour in the breast He has a malignant brain tumour. They were relieved to hear that the tumour was benign.