[dahy-uh g-nohs, -nohz, dahy-uh g-nohs, -nohz]
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.
Origin of diagnose
First recorded in 1860–65; back formation from diagnosis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
1861, back-formation from diagnosis. Related: Diagnosed; diagnosing.
Online Etymology Dictionary, © 2010 Douglas Harper
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.