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Definition of: infectious
(in·fek′shəs) adjective
1. That may be communicated by infection.
2. Able to communicate infection.
3. Law Tainting with illegality.
4. Having the quality of being transmitted from one to another: infectious laughter.
5. Obs. Infected.
—in·fec′tious·ly adverb
—in·fec′tious·ness noun
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