English Reference

Word

pus

US/ˈpəs/

UK/pˈʌs/

Definition

n. a thick, yellowish or white liquid that forms in a part of the body that is infected. It is a sign that your body is fighting off germs.

n. a thick, opaque fluid produced by infected tissue, consisting of white blood cells, bacteria, and cellular debris. Typically associated with inflammation and abscess formation.

Examples

“The doctor cleaned the pus from the wound.”

“If you notice pus coming from a cut, it usually means the area has become infected and needs medical attention.”

“The presence of pus within the cavity indicated a localized immune response, as neutrophils had migrated to the site to neutralize the invading pathogens.”

Examples

simple

“The doctor cleaned the pus from the wound.”

contextual

“If you notice pus coming from a cut, it usually means the area has become infected and needs medical attention.”

complex

“The presence of pus within the cavity indicated a localized immune response, as neutrophils had migrated to the site to neutralize the invading pathogens.”

Usage

Uncountable; often used with verbs like 'drain', 'ooze', or 'form'.

Real-World Examples

“Necrotizing fasciitis can progress quickly , producing ulcers, blisters, skin discoloration and pus.”
The Conversation · 11 Aug 2026

Etymology

From Middle English pus (15th c.), a borrowing from Latin pus (“pus”). Widely displaced quitter and atter in this sense.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domain

Medicine

This entry

Level
C2 · Proficiency
Frequency
Occasional
Updated

Scan code

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English Reference