diagnose

American

[dahy-uhg-nohs, -nohz, dahy-uhg-nohs, -nohz] / ˈdaɪ əgˌnoʊs, -ˌnoʊz, ˌdaɪ əgˈnoʊs, -ˈnoʊz /

verb (used with object)

diagnosed, diagnosing

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

The doctor diagnosed the illness as influenza.
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.
to classify or determine on the basis of scientific examination.

verb (used without object)

diagnosed, diagnosing

to make a diagnosis.

diagnose British

/ ˈdaɪəɡˌnəʊz /

verb

to determine or distinguish by diagnosis
(tr) to examine (a person or thing), as for a disease

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

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

Etymology

Origin of diagnose

First recorded in 1860–65; back formation from diagnosis

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023