Definition of diagnose verb from the Oxford Advanced Learner's Dictionary

 

diagnose

 verb
verb
BrE BrE//ˈdaɪəɡnəʊz//
 
, BrE//ˌdaɪəɡˈnəʊz//
 
; NAmE NAmE//ˌdaɪəɡˈnoʊs//
 
[transitive, intransitive]Verb Forms present simple I / you / we / they diagnose
BrE BrE//ˈdaɪəɡnəʊz//
 
, BrE//ˌdaɪəɡˈnəʊz//
 
; NAmE NAmE//ˌdaɪəɡˈnoʊs//
 
he / she / it diagnoses
BrE BrE//ˈdaɪəɡnəʊzɪz//
 
, BrE//ˌdaɪəɡˈnəʊzɪz//
 
; NAmE NAmE//ˌdaɪəɡˈnoʊsɪz//
 
past simple diagnosed
BrE BrE//ˈdaɪəɡnəʊzd//
 
, BrE//ˌdaɪəɡˈnəʊzd//
 
; NAmE NAmE//ˌdaɪəɡˈnoʊst//
 
past participle diagnosed
BrE BrE//ˈdaɪəɡnəʊzd//
 
, BrE//ˌdaɪəɡˈnəʊzd//
 
; NAmE NAmE//ˌdaɪəɡˈnoʊst//
 
-ing form diagnosing
BrE BrE//ˈdaɪəɡnəʊzɪŋ//
 
, BrE//ˌdaɪəɡˈnəʊzɪŋ//
 
; NAmE NAmE//ˌdaɪəɡˈnoʊsɪŋ//
 
Medical examinations
 
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to say exactly what an illness or the cause of a problem is diagnose (something) The test is used to diagnose a variety of diseases. diagnose something as something The illness was diagnosed as cancer. diagnose somebody with something He has recently been diagnosed with angina. diagnose somebody (as) something He was diagnosed (as) a diabetic when he was 64. diagnose somebody + adj./noun He was diagnosed (a) diabetic. Wordfinderbiopsy, diagnose, examine, sample, scan, swab, symptom, test, ultrasound, X-ray CollocationsIllnessesBecoming ill catch a cold/​an infectious disease/​the flu/(British English) flu/​pneumonia/​a virus/(informal) a bug get (British English) ill/(North American English) sick/​a disease/​AIDS/​breast cancer/​a cold/​the flu/(British English) flu/​a migraine come down with a cold/​the flu/(British English) flu contract a deadly disease/​a serious illness/​HIV/​AIDS be infected with a virus/​a parasite/​HIV develop cancer/​diabetes/​a rash/​an ulcer/​symptoms of hepatitis have a heart attack/​a stroke provoke/​trigger/​produce an allergic reaction block/​burst/​rupture a blood vessel damage/​sever a nerve/​an artery/​a tendonBeing ill feel (British English) ill/​sick/​nauseous/​queasy be running (British English) a temperature/(North American English) a fever have a head cold/​diabetes/​heart disease/​lung cancer/​a headache/(British English) a high temperature/(North American English) a fever suffer from asthma/​malnutrition/​frequent headaches/​bouts of depression/​a mental disorder be laid up with/ (British English) be in bed with a cold/​the flu/(British English) flu/​a migraine nurse a cold/​a headache/​a hangover battle/​fight cancer/​depression/​addiction/​alcoholismTreatments examine a patient diagnose a condition/​disease/​disorder be diagnosed with cancer/​diabetes/​schizophrenia prescribe/​be given/​be on/​take drugs/​medicine/​medication/​pills/​painkillers/​antibiotics treat somebody for cancer/​depression/​shock have/​undergo an examination/​an operation/​surgery/​a kidney transplant/​therapy/​chemotherapy/​treatment for cancer have/​be given an injection/(British English) a flu jab/(North American English) a flu shot/​a blood transfusion/​a scan/​an X-ray cure a disease/​an ailment/​cancer/​a headache/​a patient prevent the spread of disease/​further outbreaks/​damage to the lungs be vaccinated against the flu/(British English) flu/​the measles/(British English) measles/​polio/​smallpox enhance/​boost/​confer/​build immunity to a disease See related entries: Medical examinations Word Origin mid 19th cent.: back-formation from diagnosis.Extra examples Her condition was wrongly diagnosed by the doctor. His cancer was first diagnosed last year. His illness was later diagnosed as stomach cancer. newly diagnosed patients people with clinically diagnosed diabetes trying to diagnose faults in the computer program
See the Oxford Advanced American Dictionary entry: diagnose