Antonyms of adj contagious

2 senses of contagious

Sense 1
contagious -- (easily diffused or spread as from one person to another; "a contagious grin")

INDIRECT (VIA infectious) -> noninfectious -- (not infectious)

Sense 2
catching, communicable, contagious, contractable, transmissible, transmittable -- ((of disease) capable of being transmitted by infection)

INDIRECT (VIA infectious) -> noninfectious -- (not infectious)

Similarity of adj contagious

2 senses of contagious

Sense 1
contagious -- (easily diffused or spread as from one person to another; "a contagious grin")
       => infectious (vs. noninfectious) -- (easily spread; "fear is exceedingly infectious; children catch it from their elders"- Bertrand Russell)

Sense 2
catching, communicable, contagious, contractable, transmissible, transmittable -- ((of disease) capable of being transmitted by infection)
       => infectious (vs. noninfectious) -- (easily spread; "fear is exceedingly infectious; children catch it from their elders"- Bertrand Russell)