infectious Meaning in the Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “infectious” in the English Dictionary

"infectious" in British English

See all translations

infectiousadjective

uk   us   /ɪnˈfek.ʃəs/
C2 (of a ​disease) ​able to be ​passed one ​person, ​animal, or ​plant to another: an infectious ​diseaseC2 able to ​pass a ​disease from one ​person, ​animal, or ​plant to another: an infectious ​patient After the 21-day ​isolationperiod, ​Ebolasurvivors are no ​longer infectious.C2 Something that is infectious has an ​effect on everyone who is ​present and makes them ​want to ​join in: an infectious ​laugh infectious ​enthusiasm
(Definition of infectious from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"infectious" in American English

See all translations

infectiousadjective [not gradable]

 us   /ɪnˈfek·ʃəs/
able to ​infect someone: infectious ​diseases If something is infectious, it ​quicklyspreads or ​influencesothers: an infectious ​laugh
(Definition of infectious from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of infectious?
Add Cambridge dictionaries to your browser to your website
Word of the Day
coeducational

having male and female students being taught together in the same school or college rather than separately

Word of the Day