pathology

noun

pa·​thol·​o·​gy pə-ˈthä-lə-jē 

plural pathologies

1

: the study of the essential nature of diseases and especially of the structural and functional changes produced by them

studied plant pathology

2

: something abnormal:

a

: the structural and functional deviations from the normal that constitute disease or characterize a particular disease

the pathology of pneumonia

b

: deviation from propriety or from an assumed normal state of something nonliving or nonmaterial

the pathology of wine

c

: deviation giving rise to social ills

… connections between these pathologies … and crime …

—Wendy Kaminer

social pathology

Examples of pathology in a Sentence

the pathology of lung diseases

Recent Examples on the Web

In reality, narcissistic pathology can’t be defined by a single behavior, nor can it be identified based on a single interaction. —Mark Travers, Forbes.com, 12 June 2026

For her, being able to join the train-chasing community has served as the perfect opportunity to step outside her job in the pathology department at Northwestern Memorial Hospital. —Audrey Pachuta, Chicago Tribune, 11 June 2026

While all mosquitoes may be annoying, the ones Coloradans need to worry about are from the Culex group of species, which transmit West Nile virus, said Greg Ebel, a professor of microbiology, immunology and pathology at Colorado State University’s Center for Vector-Borne Infectious Disease. —Meg Wingerter, Denver Post, 11 June 2026

Cork recently led a meta-analysis of 30 studies investigating the effects of GLP-1s on Alzheimer’s pathology—namely the buildup of beta-amyloid and p-tau—to determine just that. —Jenna Anderson, Health, 2 June 2026

Word History

Etymology

borrowed from Middle French & New Latin; Middle French pathologie, borrowed from New Latin pathologia "study of the emotions, study of diseases," from patho- patho- + -logia -logy

Note: Probably formed on the basis of New Latin pathologicus (see pathological). In the sense "study of the emotions," perhaps directly from Greek pathología "study of the passions," attested in Greek-Latin glossaries.

First Known Use

1611, in the meaning defined at sense 1

Rhymes for pathology

• anthology
• apology
• astrology
• biology
• christology
• chronology
• conchology
• cosmology
• cryptology
• cytology
• doxology
• ecology

Kids Definition

pathology

noun

pa·​thol·​o·​gy pə-ˈthäl-ə-jē 

plural pathologies

1

: the study of diseases and especially of the changes in the body produced by them

2

: something abnormal

especially : the disorders in structure and function that occur in a particular disease

Medical Definition

pathology

noun

pa·​thol·​o·​gy -jē 

plural pathologies

1

: the study of the essential nature of diseases and especially of the structural and functional changes produced by them

2

: the anatomic and physiological deviations from the normal that constitute disease or characterize a particular disease

3

: a treatise on or compilation of abnormalities

a new pathology of the eye