contagious
adjective
1. easily diffused or spread as from one person to another
- a contagious grin
Similar word(s): infectious
2. (of disease) capable of being transmitted by infection
Similar word(s): infectious, catching, communicable, contractable, transmissible, transmittable
Sentences with contagious as an adjective:
- The flu was so contagious that everybody in town got sick!
- Wearing jeans was a contagious fad at that time.
- They were highly contagious, spreading bacteria to other people.