Of the nature of or characterized by contagion; communicating disease or corruption by contact; infectious. Also figurative.

= infectious, adj. 1; (in later use) esp. causing or responsible for infection.

Infectious; contagious.

Of a disease: = infectious, adj. 3a. Cf. infect, adj.1 1b. Obsolete. rare.

= infectious, adj.

That infects something or someone (in various senses); infectious.

Of a disease: capable of spreading from one individual to another; occurring in epidemics; transmissible, communicable; spec. transmitted by…

Of a disease or infestation: infectious; contagious; easily transmitted. Frequently figurative and in figurative contexts.

Now chiefly in predicative use. Of a disease: capable of spreading from one individual to another; infectious; contagious.

Infectious.

Having a deleterious or pernicious effect; (of a disease or illness) liable to become established; (also) infectious, catching. Now rare.

Suitable for or capable of being communicated; communicable. Obsolete.

Bearing the germs of an infectious disease; infected, contagious. Obsolete. rare.

Having a contaminating property; causing contamination.

A general epithet for infectious diseases, originally because regarded as being caused by a process analogous to fermentation (cf. zymosis, n.)…

Infectious; contagious. Also figurative. Cf. smitting, adj., smittle, adj.

Causing infection; infectious.

or of relating to autoinfection; causing autoinfection.

Of a disease or illness: capable of being transmitted from one individual to another; infectious, contagious; easily spread. Also figurative and in…

involving infection by a toxin: = toxi-infectious adj. at toxi-, comb._form affix.

occurring after an infection; caused by or associated with or a previous infection.