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noun

contagiousness

kuhn-TAY-juhs-nis
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Contagiousness (noun) means the quality of being contagious, meaning easily passed from one person or thing to another. Example: “Scientists studied the contagiousness of the new virus strain.”

noun
1
The quality of being contagious, meaning easily passed from one person or thing to another.
"Scientists studied the contagiousness of the new virus strain."
"The contagiousness of her laughter soon had the whole room smiling."
"Health officials warned about the high contagiousness of the outbreak."

How to use contagiousness

Learner’s notes

In plain EnglishHow easily something spreads from person to person.

When to use it

It sits in fairly formal or scientific writing more often than in casual speech.

Memory tip

Do not confuse it with contiguousness, which is about things touching or being next to each other, not spreading.

Trace the full origin ↓
Easily confused with
contiguousness
Common pairings
high contagiousness measure contagiousness the contagiousness of a disease reduce contagiousness
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Fill the gap

Can you complete this real example?

Scientists studied the _____ of the new virus strain.

Etymology

The word is built from the adjective contagious with the suffix -ness added to turn it into a noun describing that quality.

Origin: English

contagiosity

Rhymes for contagiousness

See all rhymes for contagiousness →

Frequently asked questions

What does contagiousness mean?
It refers to how easily something, such as a disease or an emotion, spreads from one person or thing to another.
Is contagiousness only used for diseases?
No, it can also describe non-medical things that spread easily, such as enthusiasm or laughter.
What is a synonym for contagiousness?
Contagiosity is used with a similar meaning.
What is the meaning of contagiousness?
"contagiousness" (noun) means the quality of being contagious, meaning easily passed from one person or thing to another.