Longman Dictionary of Contemporary English homepage

Topic: ILLNESS AND DISABILITY

infectious

 adjective
     
in‧fec‧tious
1MI an infectious illness can be passed from one person to another, especially through the air you breathe:
infectious diseases
2MI someone who is infectious has an illness and could pass it to other people
3 infectious feelings or laughter spread quickly from one person to another:
—infectiously adverb
Definition of infectious from the Longman Dictionary of Contemporary English within
the topic ILLNESS AND DISABILITY
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