|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|
|a. tainting or capable of tainting with illegality|
|b. rendering liable to seizure or forfeiture|
infectious in·fec·tious (ĭn-fěk'shəs)
Capable of causing infection.
Caused by or capable of being transmitted by infection.
Caused by a pathogenic microorganism or agent.