Contagious(a.) Communicable by contact, by a virus, or by a bodily exhalation; catching; as, a contagious disease.
Contagious(a.) Conveying or generating disease; pestilential; poisonous; as, contagious air.
Contagious(a.) Spreading or communicable from one to another; exciting similar emotions or conduct in others.
Contagiously(adv.) In a contagious manner.
Contagiousness(n.) Quality of being contagious.
Words within contagiousness