infectious
/ɪnˈfɛkʃəs/
adjective
- Able to be passed from one person or animal to another; catching.
- The flu is highly infectious and spreads quickly in schools.
- The doctor warned that the disease is infectious even before symptoms appear.
- Stay home if you have an infectious illness like chickenpox.
- Spreading quickly and easily to others (used about feelings, laughter, or enthusiasm).
- Her laughter was infectious, and soon everyone in the room was giggling.
- The team's infectious energy motivated the whole crowd.
- His optimism is infectious; you can't help feeling positive around him.
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