[dahy-uh g-nohs, -nohz, dahy-uh g-nohs, -nohz]
- 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.
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. 2018
- to determine or distinguish by diagnosis
- (tr) to examine (a person or thing), as for a disease
Word Origin and History for underdiagnosed
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.