contagious
word
Definition
If something is contagious, it can easily be spread from one person to another, usually talking about diseases. It can also describe emotions or behaviors (like laughter or excitement) that spread quickly among people.
Usage & Nuances
Often used for medical contexts, especially about illnesses that spread between people. Can also describe emotions or actions ('contagious laughter', 'contagious enthusiasm'). 'Contagious' is never used for non-transmissible things (e.g., 'contagious headache' is incorrect).
Example Sentences
The flu is very contagious.
basic
Chickenpox is a contagious disease.
basic
His laughter was contagious.
basic
Be careful, that cold is pretty contagious.
natural
Her enthusiasm was just so contagious that everyone joined in.
natural
That comedian’s energy on stage is really contagious.
natural