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.
to make a diagnosis.
- di·ag·nos·a·ble, adjective
- un·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, adjective
- un·di·ag·nosed, adjective
- well-di·ag·nosed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use diagnose in a sentence
It’s hard not to self-diagnose when thinking about the seeds.Sunflower Seeds Are the Best Snack for the Anxious Mind | Emma Alpern | September 17, 2020 | Eater
That was late February, when Malara diagnosed Italy’s first case of locally transmitted Covid-19.
Ultimately, he was diagnosed with a rare genetic autoimmune disorder.
Looking at the records of over 73 million patients in the US, of whom 12,033 had Covid-19, the study found those who had recently been diagnosed with a substance use disorder were significantly more at risk of Covid-19 than the average population.Substance abuse makes Covid-19 even more dangerous | Annalisa Merelli | September 16, 2020 | Quartz
The most important thing is that now you understand how to find, diagnose, and fix this problem for your website.
Levin can at least diagnose the problem and recognize that this leads to an evacuation of traditional politics.
He was flying to a foreign country to visit gravely ill patients suffering from a disease he could no more diagnose than treat.
When Smith was asked how he could diagnose Obama, he admitted he is not a psychologist and was just speculating.Republican Thinks Obama’s Mental Illness Caused Border Crisis | Gideon Resnick | July 11, 2014 | THE DAILY BEAST
Students study the hands to diagnose medical conditions, with the aid of technology of course.Art Goes High-Tech at These Four Innovative Exhibits | Justin Jones | May 29, 2014 | THE DAILY BEAST
I felt relieved for the character, and slightly abashed for rushing to diagnose her with a mental illness.Diagnosing Jane, Louis C.K.’s Troubled Daughter on ‘Louie’ Who Can’t Separate Dreams From Reality | Russell Saunders | May 15, 2014 | THE DAILY BEAST
If I diagnose or treat the fixed idea of a psychasthenic, the psychological factor itself represents the disturbance.Psychotherapy | Hugo Mnsterberg
He could not diagnose her ailment; for who would have suspected that a young, beautiful, and rich woman was resolved to die?The Terms of Surrender | Louis Tracy
The electrician soon learns to diagnose and prescribe for this, his most valuable charge.Heroes of the Telegraph | J. Munro
It is for the teacher to correctly diagnose the case and administer the most efficient remedy.Piano Mastery | Harriette Brower
Like doctors, we have to diagnose from circumstances—and even the greatest doctors are wrong at times.The Grell Mystery | Frank Froest
British Dictionary definitions for diagnose
to determine or distinguish by diagnosis
(tr) to examine (a person or thing), as for a disease
- diagnosable, 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