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Definition of Infectious
1. Adjective. Caused by infection or capable of causing infection. "A carrier remains infective without himself showing signs of the disease"
2. Adjective. Easily spread. "Fear is exceedingly infectious; children catch it from their elders"
Derivative terms: Infection
Antonyms: Noninfectious
3. Adjective. Of or relating to infection. "Infectious disease"
Definition of Infectious
1. a. Having qualities that may infect; communicable or caused by infection; pestilential; epidemic; as, an infectious fever; infectious clothing; infectious air; infectious vices.
Definition of Infectious
1. Adjective. (pathology of an illness) Transmitted from one person to another, usually through the air breathed. ¹
2. Adjective. (pathology of a person) Able to infect others. ¹
3. Adjective. (context: of feelings and behaviour) Spreading quickly from one person to another. ¹
4. Adjective. (informal) Memorable and invoking excitement or interest. ¹
¹ Source: wiktionary.com
Definition of Infectious
1. [adj]
Medical Definition of Infectious
1. 1. Capable of being transmitted by infection, with or without actual contact. Synonym: infective. 3. Denoting a disease due to the action of a microorganism. (05 Mar 2000)