infectious /ɪnˈfɛkʃəs/ adjective Learner's definition of INFECTIOUS
1
a : capable of causing infection传染的;感染的 b [more infectious; most infectious] : capable of being passed to someone else by germs that enter the body有传染性的 — compare contagious c : suffering from a disease that can be spread to other people by germs患传染病的 2
[more infectious; most infectious] : capable of being easily spread to other people有感染力的 -
Their enthusiasm was infectious. [=contagious]他们的热情富有感染力。
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She has an infectious grin.她那咧嘴一笑颇具感染力。
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infectious laughter富有感染力的笑声