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- pronunciation:
- ihn
fek
sh
 s
- features:
- Word Explorer
| part of speech: |
adjective |
| definition 1: |
able to be given to others by infection.
We had to keep the cat by itself for six weeks because its disease was infectious.- synonyms:
- communicable, contagious
- similar words:
- catching, septic, toxic
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| definition 2: |
spreading easily as though by infection.
He has such an infectious smile!- synonyms:
- catching
- similar words:
- communicable, compelling, irresistible
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| derivations: |
infectiously (adv.), infectiousness (n.) |
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