communicable by infection, as from one person to another or from one part of the body to another

infectious diseases.

causing or communicating infection.

tending to spread from one to another

infectious laughter.

Law . capable of contaminating with illegality; exposing to seizure or forfeiture.

Obsolete . diseased.

adjective

antiseptic , germless , harmless , non-infectious , uncommunicable , uncontagious

adjective

communicable , contagious , contaminating , corrupting , defiling , diseased , epidemic , infective , mephitic , miasmic , noxious , pestilent , pestilential , poisoning , polluting , toxic , transferable , transmittable , virulent , vitiatingnotes:diseases spread by contact are contagious and those spread by air or water are infectious , catching , taking , pestiferous , poisonous , spreading , transmissible , transmitted , vitiating