Pandemic
noun / adjective /pænˈdɛm.ɪk/ — A disease outbreak prevalent across countries or worldwide
Definition
A disease that has spread across multiple countries or continents, affecting a large proportion of the world's population. A pandemic is an epidemic that has escaped containment — the word comes from the Greek for 'all the people.'
Beyond the definition
After 2020, pandemic became a word that carries lived experience rather than just medical definition. It now names not just an outbreak but a before-and-after — the event that divided everything into prior and subsequent.
Origin & history
Greek: pan (all) + dēmos (people). A pandemic is what happens when a disease reaches all people — or tries to. The word carries the scale of the threat in its etymology.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
The 1918 influenza pandemic killed more people than the First World War.
During the pandemic, the word itself became part of everyone's daily vocabulary.
Pandemic is the word that means the disease has found all of us.
Synonyms
global outbreak, worldwide epidemic
Antonyms
endemic, localised outbreak
Related words
Pandemic vs epidemic
An epidemic is a sudden increase in cases in a specific region. A pandemic is an epidemic that has spread across multiple countries or worldwide.
Compare this word
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Observer of Shifting City Life

A person walks through a rain-slicked city, observing the patterns of the entire square.
The observer watches the city as a living, shifting entity affecting many people at once. This mirrors the scope of a pandemic, which spreads across populations and regions, reflecting a phenomenon that encompasses 'all the people' in a vast, interconnected environment.
Image credit: Wordspun · AI-generated conceptual illustration