contagious Definition in the Cambridge English Dictionary
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Definition of “contagious” - English Dictionary

Definition of "contagious" - American English Dictionary

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contagiousadjective

 us   /kənˈteɪ·dʒəs/
(of a ​disease) ​able to be ​caught by ​touching someone with the ​disease or something the ​person has ​touched or ​worn, or (of a ​person) having this ​type of ​disease: a ​highly contagious ​strain of ​flu fig. Contagious also ​meansmovingeasily from one ​person to another: The ​mood was contagious, and ​soon everyone was ​laughing.
(Definition of contagious from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "contagious" - British English Dictionary

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contagiousadjective

uk   us   /kənˈteɪ.dʒəs/
A contagious ​disease can be ​caught by ​touching someone who has the ​disease or a ​piece of ​infectedclothing: The ​infection is highly contagious, so don't ​let anyone ​else use ​yourtowel. A contagious ​person has a contagious ​disease: Keep him out of ​school until he's not contagious ​anymore. A contagious ​feelingspreadsquickly among ​people: Fear is contagious.
(Definition of contagious from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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