Definitions for: Infectious


[adj] easily spread; "fear is exceedlingly infectious; children catch it from their elders"- Bertrand Russell
[adj] caused by infection or capable of causing infection; "viruses and other infective agents"; "a carrier remains infective without himself showing signs of the disease"



Webster (1913) Definition: In*fec"tious, a. [Cf. F. infectieux.]
1. Having qualities that may infect; communicable or caused
by infection; pestilential; epidemic; as, an infectious
fever; infectious clothing; infectious air; infectious
vices.

Where the infectious pestilence. --Shak.

2. 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. --Dryden.

3. (Law) Contaminating with illegality; exposing to seizure
and forfeiture.

Contraband articles are said to be of an infectious
nature. --Kent.

4. Capable of being easily diffused or spread; sympathetic;
readily communicated; as, infectious mirth.

The laughter was so genuine as to be infectious.
--W. Black.

Syn: See Contagious.

Synonyms: catching, communicable, contagious, contaminating, contractable, corrupting, infective, septic, transmissible, transmittable

Antonyms: noninfectious

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