1 : able to be passed from one person or animal to another by touching

• a contagious disease
• It’s a highly contagious

2 : having a sickness that can be passed to someone else by touching

• I have a cold and I’m still contagious.
• I’m sick, but the doctor says I’m not contagious.

3 : capable of being easily spread to others : causing other people to feel or act a similar way

• She has a contagious
• contagious enthusiasm/laughter

— contagiously adverb