[ dahy-uhg-nohs, -nohz, dahy-uhg-nohs, -nohz ]
/ ˈdaɪ əgˌnoʊs, -ˌnoʊz, ˌdaɪ əgˈnoʊs, -ˈnoʊz /
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verb (used with object), di·ag·nosed, di·ag·nos·ing.
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), di·ag·nosed, di·ag·nos·ing.
to make a diagnosis.
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Origin of diagnose
First recorded in 1860–65; back formation from diagnosis
OTHER WORDS FROM diagnose
di·ag·nos·a·ble, adjectiveun·der·di·ag·nose, verb (used with object), un·der·di·ag·nosed, un·der·di·ag·nos·ing.un·di·ag·nos·a·ble, adjectiveun·di·ag·nosed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for diagnose
/ (ˈdaɪəɡˌnəʊz) /
to determine or distinguish by diagnosis
(tr) to examine (a person or thing), as for a disease
Derived forms of diagnosediagnosable, adjective
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
Medical definitions for diagnose
[ dī′əg-nōs′, -nōz′ ]
To distinguish or identify a disease by diagnosis.
To identify a person as having a particular disease or condition by diagnosis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.