contagious

/kənˈteɪdʒəs/
adjective
  1. (of a disease) Able to be passed from one person or animal to another by direct or indirect contact.
    • Even before symptoms appear, some viruses are already contagious.
    • Measles is one of the most contagious diseases known to medicine.
    • The doctor told her to stay home because the rash was highly contagious.
  2. (of a feeling, attitude, or behavior) Spreading quickly to others; catching.
    • Yawning can be contagious — when one person yawns, others often do too.
    • Her laughter was so contagious that soon the whole room was giggling.
    • The team's positive attitude proved contagious, boosting everyone's morale.
What does "contagious" mean? | whatsthatwordmean | whatsthatwordmean