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Definition of infectiousness

infectiousness

/ɪnˈfɛk.ʃəs.nəs/
in · fec · tious · ness
Adverb:infectiously
•
Adjective:infectious
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infectiousness Lexical Profile

infectiousness Game Scores & Validity

• noun

1

The quality or degree of being able to spread disease or infection from one organism to another through the environment or direct contact.

Example

"Epidemiologists studied the new viral strain to determine its rate of infectiousness among school-aged children."

2

The tendency of an emotion, mood, or quality to spread quickly and irresistibly from one person to others.

Example

"The sheer infectiousness of the conductor's enthusiasm soon had the entire audience clapping along to the music."

Synonyms
View all synonyms for infectiousness

• Rhymes for infectiousness

• Nearby Words

infection
infectious
infectiously
infectiousness
infective
infectiveness
infector

Cite this Entry

Wordmom. (2026). Definition of Infectiousness. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/infectiousness
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