Definition of infectious disease in English English dictionary
Any disease caused by the entrance, growth, and multiplication of bacteria or protozoans in the body; a germ disease
contagious illness, communicable sickness, transmittable disease, disease caused by the growth of pathogenic organisms in the body
Sometimes, as distinguished from contagious disease, such a disease communicated by germs carried in the air or water, and thus spread without contact with the patient, as measles