s]
| 1. | communicable by infection, as from one person to another or from one part of the body to another: infectious diseases. |
| 2. | causing or communicating infection. |
| 3. | tending to spread from one to another: infectious laughter. |
| 4. | Law. capable of contaminating with illegality; exposing to seizure or forfeiture. |
| 5. | Obsolete. diseased. |
infectious in·fec·tious (ĭn-fěk'shəs)
adj.
Capable of causing infection.
Caused by or capable of being transmitted by infection.
Caused by a pathogenic microorganism or agent.