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/ɪnfˈɛkʃəs/ Listen

adjective

Infectious adj.

Having qualities that may infect; communicable or caused by infection; pestilential; epidemic; as, an infectious fever; infectious clothing; infectious water; infectious vices. "Where the infectious pestilence."

Corrupting, or tending to corrupt or contaminate; vitiating; demoralizing. "It (the court) is necessary for the polishing of manners... but it is infectious even to the best morals to live always in it."

(Law) Contaminating with illegality; exposing to seizure and forfeiture. "Contraband articles are said to be of an infectious nature."

Capable of being easily diffused or spread; sympathetic; readily communicated; as, infectious mirth. "The laughter was so genuine as to be infectious."

Synonyms: See Contagious.

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Etymology of 'Infectious'

Collaborative International Dictionary of English 0.48

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"Infectious" Quotes from Famous Books

... An infectious or communicable disease is one caused by the admission of some form of living matter into the body of a human being or of a lower animal. All diseases are clearly not communicable in the sense that they are due to the presence of living things. Indigestion, for instance, I can ...

— Popular Science Monthly Volume 86

... SWIFT MACNEILL'S smile infectious. It illumined with something of saintly halo the depressed figure of Dr. BARTON, who, again breaking his vow of silence, confessed that yesterday he had been enrolled as Member of an Organisation in Ulster sworn to resist Home-Rule. "I don't know, Mr. SPEAKER," he said, ...

— Punch, or the London Charivari, Vol. 104, April 15, 1893 • Various

... Father, keep through Thine own name those whom Thou hast given Me. I pray not that Thou shouldest take them out of the world, but that Thou shouldest keep them from evil." It is this same feeling of the spreading, insidious, infectious and destructive nature of sin that makes us echo this as our first and most earnest prayer for all we love, that God may keep them from evil; and it is this that makes us value so highly and recognise with thankful hearts every example of a pure and strong life, ...

— Sermons at Rugby • John Percival

... merely an affectionate and interested visitor and not a mother with a budget of suggestions and corrections and rearrangements, Mrs. Harley added to the complication. Usually the most natural woman in the world with a soft infectious laugh, a rather shrewd humor and a neat gift of comment, she assumed a metallic artificiality that distressed herself and surprised Joan. She babbled about absolutely nothing by the yard, talked over George's halting but gallant attempts to make things easy like any Clubwoman, and ...

— Who Cares? • Cosmo Hamilton

... as she was to excitement in the meetings of the Saints, her mind easily resisted the infectious influence. Finney's teaching had not differed in any respect from the doctrine which she heard from her husband daily, a doctrine which she knew by experience did not save men from delusion and rancour. She still listened eagerly ...

— The Mormon Prophet • Lily Dougall

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