Pronunciation: (dī'ug-nōs", -nōz", dī"ug-nōs', -nōz'), [key]
—v., -nosed, -nos•ing.
1. to determine the identity of (a disease, illness, etc.) by a medical examination: The doctor diagnosed the illness as influenza.
2. 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.
3. to classify or determine on the basis of scientific examination.
to make a diagnosis.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.