/ Dictionary / Index P pathology: Meaning and Definition of Find definitions for: pa•thol•o•gy Pronunciation: (pu-thol'u-jē), [key] — pl. -gies. the science or the study of the origin, nature, and course of diseases. the conditions and processes of a disease. any deviation from a healthy, normal, or efficient condition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pathology (Thesaurus) pathologic anatomy pathomorphism Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language