diagnose

[dahy-uhg-nohs, -nohz, dahy-uhg-nohs, -nohz]

verb (used with object)

diagnosed, diagnosing 

1. to determine the identity of (a disease, illness, etc.) by a medical examination.

   The doctor diagnosed the illness as influenza.

2. to ascertain the cause or nature of (a disorder, malfunction, problem, etc.) from the symptoms.

   The mechanic diagnosed the trouble that caused the engine knock.

3. to classify or determine on the basis of scientific examination.

verb (used without object)

diagnosed, diagnosing 

1. to make a diagnosis.

diagnose

/ ˈdaɪəɡˌnəʊz /

verb

1. to determine or distinguish by diagnosis

2. (tr) to examine (a person or thing), as for a disease

Other Word Forms

• diagnosable adjective
• underdiagnose verb (used with object)
• undiagnosable adjective
• undiagnosed adjective
• well-diagnosed adjective

Word History and Origins

Origin of diagnose¹

First recorded in 1860–65; back formation from diagnosis

Example Sentences

In the early days of research, dementia was diagnosed only in autopsies, and later through spinal fluid or PET scans.

From Los Angeles Times

In May, he was diagnosed with an aggressive form of prostate cancer that has spread to his bones.

From BBC

The procedure, known as the haemoglobin A1C test, measures average blood sugar levels which are used to diagnose type 2 diabetes and monitor the condition.

From BBC

“I’m trying to give a template for people that get diagnosed with this to, one, know they have options available to them,” Jordan said.

From Los Angeles Times

Meinir, from Vale of Glamorgan, said her daughter Mali was diagnosed with dyslexia in Year Seven and has struggled with processing information gradually over the years.

From BBC

Related Words

• analyze 
• determine 
• investigate 
• pinpoint 
• pronounce 
• recognize