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adjective
1.
communicable by infection, as from one person to another or from one part of the body to another: infectious diseases.
2.
causing or communicating infection.
3.
tending to spread from one to another: infectious laughter.
4.
Law. capable of contaminating with illegality; exposing to seizure or forfeiture.
5.
Obsolete. diseased.
Related forms
in·fec·tious·ly, adverb
in·fec·tious·ness, noun
non·in·fec·tious, adjective
non·in·fec·tious·ly, adverb
non·in·fec·tious·ness, noun
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Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Infectious
is always a great word to know.
So is testify. Does it mean:
| to state or declare under oath or affirmation, usually in court |
| a judicial process or order requiring the person or persons to whom it is directed to do a particular act or to refrain from doing a particular act |
Example Sentences
- It will retrofit a building with new air filters, to keep infectious germs from spreading.
- But the infectious prions fold differently than the normal prions.
- Waterborne and insect-transmitted infectious diseases get a big boost from climate change.
Collins
World English Dictionary
| infectious (ɪnˈfɛkʃəs) | |
| —adj | |
| 1. | Compare contagious (of a disease) capable of being transmitted |
| 2. | (of a disease) caused by microorganisms, such as bacteria, viruses, or protozoa |
| 3. | causing or transmitting infection |
| 4. | tending or apt to spread, as from one person to another: infectious mirth |
| 5. | international law |
| a. tainting or capable of tainting with illegality | |
| b. rendering liable to seizure or forfeiture | |
| in'fectiously | |
| —adv | |
| in'fectiousness | |
| —n | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary
infectious in·fec·tious (ĭn-fěk'shəs)
adj.
Capable of causing infection.
Caused by or capable of being transmitted by infection.
Caused by a pathogenic microorganism or agent.
in·fec'tious·ness n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
infectious  (ĭn-fěk'shəs) Pronunciation Key
Capable of causing infection. See Note at contagious. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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